Need help in Pro*c program
I am trying to create trigger inside a pro*c program using the normal syntax. It's giving error during precompilation.
I am planning to like this
Create trigger after update on table for each row
begin
read data from the row and write it into file for ftp'ing
end.
Please reply at your earliest.
Thanks in advance.
exec sql create or replace trigger <name> before update on <tablname> as
begin
end;
I think this will be of use to you.
Similar Messages
-
Need help for writing extract program
hi
i need help for writing extract program to retriew data from legacy system.
i already developed bdc programs for me31k and me21.
my requirement is to write extract program s for those t.codes.
to retriew data from legacy system and stored in flat file.i need help with a java program. it is a program that allows the user to enter a student's GPA, number of extracurricular activities, and number of service activities. The user can not enter a gpa above 4.0 or below 0. The user can not enter a negative number for the number of both activities. If the student meets the following criteria: 1) GPA of 3.8 or above and at least one extracurricular activity and one service activity, 2) GPA below 3.8 but at least 3.4 and a total of at least three extracurricular and service activities, 3) GPA below 3.4 but at least 3.0 and at least two extracurricular activities and three service activities, the message "Scholarship candidate" should display. If the student does not meet the criteria above, then the message"not a candidate" should display. Can you help me, please?
You haven't posted ANY 'java program' for us to help with.
The forum is NOT a coding service. It is to help you with YOUR code.
Post the code you have written and SHOW us (don't just tell us) how you compile it and execute it and the results you get. Then we can help you with any problems you are are having.
If you need help understanding just what the program should be doing you need to ask your instructor to clarify the assignment. -
I need help instantly on this program please
import java.util.*;
public class D3
private static int[] z = new int[100000];
private static int first=z[0];
private static int last=z[n-1];
private static int n=100000;
public static void main(String args[])
Scanner input=new Scanner(System.in);
for(int i=0;i<z.length;i++)
z=2*i;
int seqSearch(z;50000;n); //method call 4 key where key=mid
int binSearch(z;first;last;50000);
int seqSearch(z;35467;n); //method call 4 key where key in the left half
int binSearch(z;first;last;35467);
int seqSearch(z;89703;n); //method call 4 key where key in the right half
int binSearch(z;first;last;89703);
public int seqSearch(int z[];int key;int n)
long start = System.currentTimeMillis();
int count=0;
int ans=-1;
for(int i=0;i<n;i++)
if z[i]=key
count++
{ans=i
break;}
return ans;
long elapsed = System.currentTimeMillis() - start;
System.out.print("Execution Time:" + elapsed);
System.out.print("# of Basic Operations:" + count);
public int binSearch(int z[];int first;int last;int key)
long start = System.currentTimeMillis();
int count=0;
if(last<first){
count++;
index=-1;
else
count++;
int mid=(first+last)/2
if(ket=z[mid]{
index=mid;
else
if(key<z[mid]){
index = binSearch(z[];first;mid-1;key);
else
index=binSearch(z[];mid+1;last;key);
return index;
long elapsed = System.currentTimeMillis() - start;
System.out.print("Execution Time:" + elapsed);
System.out.print("# of Basic Operations:" + count);
// if anyone could tell me whats wrong with my code i'd be greatful...the program is supposed to perform binary and sequential search on a sorted array of 100000 numbers.once on an item in the middle of the array once on the right side of it and once on the left side...i also need to count the number of basic operations for the same number in both sequential and binary to see whats better.and i need to check the time...plz i need help now,,,"Guide to a first-time poster"
you need to add exclamation marks to signify how urgent it is
e.g.
i need help instantly on this program please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
capital letters is better
I NEED HELP INSTANTLY ON THIS PROGRAM PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
starting the italics on line 1, better again
import java.util.*;
public class D3
private static int[] z = new int[100000];
private static int first=z[0];
private static int last=z[n-1];
private static int n=100000;
public static void main(String args[])
Scanner input=new Scanner(System.in);
for(int i=0;i<z.length;i++)
z=2*i;
int seqSearch(z;50000;n); //method call 4 key where key=mid
int binSearch(z;first;last;50000);
int seqSearch(z;35467;n); //method call 4 key where key in the left half
int binSearch(z;first;last;35467);
int seqSearch(z;89703;n); //method call 4 key where key in the right half
int binSearch(z;first;last;89703);
public int seqSearch(int z[];int key;int n)
long start = System.currentTimeMillis();
int count=0;
int ans=-1;
for(int i=0;i<n;i++)
if z=key
count++
{ans=i
break;}
return ans;
long elapsed = System.currentTimeMillis() - start;
System.out.print("Execution Time:" + elapsed);
System.out.print("# of Basic Operations:" + count);
public int binSearch(int z[];int first;int last;int key)
long start = System.currentTimeMillis();
int count=0;
if(last><first){
count++;
index=-1;
else
count++;
int mid=(first+last)/2
if(ket=z[mid]{
index=mid;
else
if(key><z[mid]){
index = binSearch(z[];first;mid-1;key);
else
index=binSearch(z[];mid+1;last;key);
return index;
long elapsed = System.currentTimeMillis() - start;
System.out.print("Execution Time:" + elapsed);
System.out.print("# of Basic Operations:" + count);
and what about the dukes, offer 10 (never to be awarded, of course)
do this, then sit back and watch the replies roll in. -
Need help with my addressbook program
hi,
i need help with my program here. this one should works as:
- saves user input into a txt file
- displays name of the saved person on the jlist whenever i run the program
- displays info about the person when clicked via textboxes given by reading the txt file where the user inputs are
- should scroll when the list exceeds the listbox
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.JList;
import java.awt.event.ActionListener;
import java.io.*;
import javax.swing.event.*;
import java.io.FilterInputStream;
public class AddressList extends JPanel implements ActionListener
JTextField txt1 = new JTextField();
JTextField txt2 = new JTextField();
JTextField txt3 = new JTextField();
DefaultListModel mdl = new DefaultListModel();
JList list = new JList();
JScrollPane listScroller = new JScrollPane(list);
ListSelectionModel listSelectionModel;
File fob = new File("Address3.txt");
String name;
char[] chars;
public void ListDisplay()
try
RandomAccessFile rand = new RandomAccessFile(fob,"rw");
BufferedReader br = new BufferedReader(new FileReader("Address3.txt"));
if(fob.exists())
while((name = rand.readLine()) != null)
chars = name.toCharArray();
if(chars[0] == '*')
mdl.addElement(name);
list.setModel(mdl);
if(chars[0] == '#')
continue;
else
System.out.println("No such file..");
catch(IOException a)
System.out.println(a.getMessage());
public AddressList()
this.setLayout(null);
listSelectionModel = list.getSelectionModel();
listSelectionModel.addListSelectionListener(new ListInfo());
list.setBounds(10,40,330,270);
listScroller.setBounds(320,40,20,100);
add(list);
add(listScroller);
JLabel lbl4 = new JLabel("Name: ");
lbl4.setBounds(400,10,80,30);
add(lbl4);
JLabel lbl5 = new JLabel("Cellphone #: ");
lbl5.setBounds(400,50,80,30);
add(lbl5);
JLabel lbl6 = new JLabel("Address: ");
lbl6.setBounds(400,90,80,30);
add(lbl6);
JLabel lbl7 = new JLabel("List ");
lbl7.setBounds(10,10,100,30);
add(lbl7);
txt1.setBounds(480,10,200,30);
add(txt1);
txt2.setBounds(480,50,200,30);
add(txt2);
txt3.setBounds(480,90,200,30);
add(txt3);
JButton btn1 = new JButton("Add");
btn1.setBounds(480,130,100,30);
btn1.addActionListener(this);
btn1.setActionCommand("Add");
add(btn1);
JButton btn2 = new JButton("Save");
btn2.setBounds(480,170,100,30);
btn2.addActionListener(this);
btn2.setActionCommand("Save");
add(btn2);
JButton btn3 = new JButton("Cancel");
btn3.setBounds(480,210,100,30);
btn3.addActionListener(this);
btn3.setActionCommand("Cancel");
add(btn3);
JButton btn4 = new JButton("Close");
btn4.setBounds(480,250,100,30);
btn4.addActionListener(this);
btn4.setActionCommand("Close");
add(btn4);
public static void main(String[]args)
JFrame frm = new JFrame("Address List");
AddressList panel = new AddressList();
frm.getContentPane().add(panel,"Center");
frm.setSize(700,350);
frm.setVisible(true);
panel.ListDisplay();
public void actionPerformed(ActionEvent e)
String cmd;
cmd = e.getActionCommand();
if(cmd.equals("Add"))
txt1.setText("");
txt2.setText("");
txt3.setText("");
else if(cmd.equals("Save"))
mdl.addElement(txt1.getText());
list.setModel(mdl);
try
RandomAccessFile rand = new RandomAccessFile(fob,"rw");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
LineNumberReader line = new LineNumberReader(br);
if(fob.exists())
rand.seek(fob.length());
rand.writeBytes("* " + txt1.getText());
rand.writeBytes("\r\n" + "# " + txt2.getText());
rand.writeBytes("\r\n" + "# " + txt3.getText() + "\r\n");
else
System.out.println("No such file..");
txt1.setText("");
txt2.setText("");
txt3.setText("");
catch(IOException a)
System.out.println(a.getMessage());
else if(cmd.equals("Cancel"))
txt1.setText("");
txt2.setText("");
txt3.setText("");
else if(cmd.equals("Close"))
System.exit(0);
class ListInfo implements ListSelectionListener
public void valueChanged(ListSelectionEvent e)
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
int minIndex = lsm.getMinSelectionIndex();
int maxIndex = lsm.getMaxSelectionIndex();
try //*this one should display the info of the person whenever i click the person's name at the list box via textbox.. but i cant seem to get it right since it always display the info of the first person inputed.. i tried to get the program to display them whenever it reads lines with * on them....
File fob = new File("Address3.txt");
RandomAccessFile rand = new RandomAccessFile(fob,"rw");
BufferedReader br = new BufferedReader(new FileReader("Address3.txt"));
LineNumberReader line = new LineNumberReader(br);
if(fob.exists())
for(int i = minIndex; i<=maxIndex; i++)
if(lsm.isSelectedIndex(i))
while((name = rand.readLine()) != null)
chars = name.toCharArray();
if(chars[0] == '#')
continue;
if(chars[0] == '*')
txt1.setText(rand.readLine());
txt2.setText(rand.readLine());
txt3.setText(rand.readLine());
else
System.out.println("No such file..");
catch(IOException a)
System.out.println(a.getMessage());
}the only problem now is about how it should display the right info about the person whenever i click its name on the list.. something about file reading or something, i just cant figure it out.
and also about how to make it scroll once it exceeds the list.. i cant make it work, maybe something about wrong declaration..
thanks in advance..
Edited by: syder on Mar 14, 2008 2:26 AMLike said before, do one thing at a time. At startup, something like:
//put all the content in a list
ArrayList<String> lines = new ArrayList<String>();
while(String line=rand.readLine()!=null) {
lines.add(line);
}If you follow the good advice to create a class to encapsulate the entries, you could populate a list of such entries like this:
static final int ENTRY_SIZE = 3;//you have 3 fields now, better to have a constant if that changes
ArrayList<Entry> entries = new ArrayList<Entry>();
for(int i=0; i<lines.size(); i+=ENTRY_SIZE) {
Entry entry = new Entry(lines.get(i), lines.get(i+1), lines.get(i+2);
entries.add(newEntry);
}You could also do both of the above in one run, but I think you will understand better what's happening if you do one thing at a time.
If you don't want to put the entries in an encapsulating class, you can still access this without looping:
int listStartIdx = <desired_entry_index>*ENTRY_SIZE;
String att1 = lines.get(listStartIdx).substring(1);
String att2 = lines.get(listStartIdx+1).substring(1);
String att3 = lines.get(listStartIdx+2).substring(1); -
Need help with a rudimentary program
I'm sort of new at this so i need help with a few things... I'm making a program to compile wages and i need answers with three things: a.) what are the error messages im getting meaning? b.) How can i calculate the state tax as 2% of my gross pay with the first $200 excluded and c.) how can i calculate the local tax as a flat $10 with $2 deducted for each dependant. any help is appreciated
Here is what i have so far:
public class WagesAsign1
public static void main(String[] args)
int depend=4;
double hrsWork=40;
double payRate=15;
double grossPay;
grossPay=payRate*hrsWork;
double statePaid;
double stateTax=2.0;
statePaid=grossPay*(stateTax/100);
double localPaid;
double localTax=10.0;
localPaid=grossPay*(localTax/100);
double fedPaid;
double fedTax=10.0;
double taxIncome;
fedPaid=taxIncome*(fedTax/100);
taxIncome=grossPay-(statePaid+localPaid);
double takeHome;
System.out.println("Assignment 1 Matt Foraker\n");
System.out.println("Hours worked="+hrsWork+" Pay rate $"+payRate+" per/hour dependants: "+depend);
System.out.println("Gross Pay $"+grossPay+"\nState tax paid $"+statePaid+"\nLocal tax paid $"+localPaid+"\nFederal tax paid $"+fedPaid);
System.out.println("You take home a total of $"+takeHome);
and these are the error messages so far:
WagesAsign1.java:23: variable taxIncome might not have been initialized
fedPaid=taxIncome*(fedTax/100);
^
WagesAsign1.java:29: variable takeHome might not have been initialized
System.out.println("You take home a total of $"+takeHome);
^edit: figured it out... please delete post
Message was edited by:
afroryan58 -
Need help on my GRADING program.....A S A P!!!!!
I need help!!!
look at how i programmed it ....
But i got one thing on my mind that is confusing me, its this problem (im trying to let the com display the grades being inputed in the statement.. )
This is the CODE i came up with:
import java.io.*;
public class Grade_Array
public static void main(String [] args)throws IOException
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
int x=0, ent=0, y=0, len[]=new int[65], i=0, s=50;
String sec="", sent="", sgrade="", ans="", name[]=new String[65], tn="", section="", yl="";
double grade[][]=new double[65][15], ave[]=new double[65], tg=0, ta=0;
do
System.out.print("Enter Year Level: ");
yl=dataIn.readLine();
System.out.print("Enter Section: ");
sec=dataIn.readLine();
System.out.print("How many entries for section "+sec+" : ");
sent=dataIn.readLine();
ent=Integer.parseInt(sent);
for(x=1; x<=ent; x++)
double sum=0;
System.out.print("Enter "+x+" Students Name: ");
name[x]=dataIn.readLine();
for(y=1; y<=9; y++)
System.out.print("Enter Subject Grade # "+y+":");
sgrade=dataIn.readLine();
grade[x][y]=Double.parseDouble(sgrade);
if(y==1)grade[x][1]=grade[x][1]*1.5;
if(y==2)grade[x][2]=grade[x][2]*1.2;
if(y==3)grade[x][3]=grade[x][3]*1.5;
if(y==4)grade[x][4]=grade[x][4]*1.8;
if(y==5)grade[x][5]=grade[x][5]*1.2;
if(y==6)grade[x][6]=grade[x][6]*1.5;
if(y==7)grade[x][7]=grade[x][7]*1.2;
if(y==8)grade[x][8]=grade[x][8]*0.6;
if(y==9)grade[x][9]=grade[x][9]*0.2;
sum=sum+grade[x][y];
ave[x]=sum/10.7;
System.out.println("Average is: "+ave[x]);
System.out.println("");
//-----aligning in column---
for(x=1;x<=ent;x++)
len[x]=name[x].length();
if(len[x]>s)s=len[x];
for(x=1;x<=ent;x++)
for(i=1;i<=10;i++)
do
name[x]=name[x]+" ";
len[x]=name[x].length();
while(len[x]<=s);
for(x=1;x<=ent;x++)
for(y=1;y<=ent-1;y++)
if(ave[y]<ave[y+1])
ta=ave[y];
ave[y]=ave[y+1];
ave[y+1]=ta;
tn=name[y];
name[y]=name[y+1];
name[y+1]=tn;
if(y==1)grade[x][1]=grade[x][1]/1.5;
if(y==2)grade[x][2]=grade[x][2]/1.2;
if(y==3)grade[x][3]=grade[x][3]/1.5;
if(y==4)grade[x][4]=grade[x][4]/1.8;
if(y==5)grade[x][5]=grade[x][5]/1.2;
if(y==6)grade[x][6]=grade[x][6]/1.5;
if(y==7)grade[x][7]=grade[x][7]/1.2;
if(y==8)grade[x][8]=grade[x][8]/0.6;
if(y==9)grade[x][9]=grade[x][9]/0.2;
do
System.out.println(" University of San Carlos");
System.out.println(" Basic Education");
System.out.println(" High School");
System.out.println(" R A N K I N G S");
System.out.println(" YEAR LEVEL: "+yl+" SECTION: "+sec);
for(x=1;x<=ent;x++)
System.out.printf(" "+x+"."+name[x]+" ... %.2f %n",ave[x]);
System.out.print("Display the RANKINGS again?<Y/N>: ");
ans=dataIn.readLine();
while(ans.equals("Y")||ans.equals("y"));
System.out.print("Another Section<Y/N>?: ");
ans=dataIn.readLine();
while(ans.equals("Y")||ans.equals("y"));
Edited by: JetHack on Oct 5, 2008 2:22 AMJetHack wrote:
so what should i do ??What should you do? Display the 9 grades and then display the average of them. You just answered your own question.
or could you correct it in some way??(Displaying the 9 grades and the average)Correct what? You haven't given us a problem to help you correct. You have just stated that this is what you need to do. We aren't going to hand you code to frankenstein into your own... If you have a problem, then state it. Otherwise, you are just looking for someone to do your homework. -
Need Help with simple array program!
Hi, I have just recently started how to use arrays[] in Java and I'm a bit confused and need help designing a program.
What this program does, it reads in a range of letters specified by the user. The user then enters the letters (a, b or c) and stores these characters into an array, which the array's length is equal to the input range the user would enter at the start of the program. The program is then meant to find how many times (a,b and c) appears in the array and the Index it first appears at, then prints these results.
Here is my Code for the program, hopefully this would make sense of what my program is suppose to do.
import B102.*;
class Letters
static int GetSize()
int size = 0;
boolean err = true;
while(err == true)
Screen.out.println("How Many Letters would you like to read in?");
size = Keybd.in.readInt();
err = Keybd.in.fail();
Keybd.in.clearError();
if(size <= 0)
err = true;
Screen.out.println("Invalid Input");
return(size);
static char[] ReadInput(int size)
char input;
char[] letter = new char[size];
for(int start = 1; start <= size; start++)
System.out.println("Please enter a letter (a, b or c) ("+size+" max), enter # to stop:");
input = Keybd.in.readChar();
while((input != 'a') && (input != 'b') && (input != 'c') && (input != '#'))
Screen.out.println("Invalid Input");
System.out.println("Please enter a letter (a, b or c) ("+size+" max, enter # to stop:");
input = Keybd.in.readChar();
while(input == '#')
start == size;
break;
for(int i = 0; i < letter.length; i++)
letter[i] = input;
return(letter);
static int CountA(char[] letter)
int acount = 0;
for(int i = 0; i < letter.length; i++)
if(letter[i] == 'a')
acount++;
return(acount);
static int CountB(char[] letter)
int bcount = 0;
for(int i = 0; i < letter.length; i++)
if(letter[i] == 'b')
bcount++;
return(bcount);
static int CountC(char[] letter)
int ccount = 0;
for(int i = 0; i < letter.length; i++)
if(letter[i] == 'c')
ccount++;
return(ccount);
static int SearchA(char[] letter)
int ia;
for(ia = 0; ia < letter.length; ia++)
if(letter[ia] == 'a')
return(ia);
return(ia);
static int SearchB(char[] letter)
int ib;
for(ib = 0; ib < letter.length; ib++)
if(letter[ib] == 'b')
return(ib);
return(ib);
static int SearchC(char[] letter)
int ic;
for(ic = 0; ic < letter.length; ic++)
if(letter[ic] == 'c')
return(ic);
return(ic);
static void PrintResult(char[] letter, int acount, int bcount, int ccount, int ia, int ib, int ic)
if(ia <= 1)
System.out.println("There are "+acount+" a's found, first appearing at index "+ia);
else
System.out.println("There are no a's found");
if(ib <= 1)
System.out.println("There are "+bcount+" b's found, first appearing at index "+ib);
else
System.out.println("There are no b's found");
if(ic <= 1)
System.out.println("There are "+ccount+" c's found, first appearing at index "+ic);
else
System.out.println("There are no c's found");
return;
public static void main(String args[])
int size;
char[] letter;
int acount;
int bcount;
int ccount;
int ia;
int ib;
int ic;
size = GetSize();
letter = ReadInput(size);
acount = CountA(letter);
bcount = CountB(letter);
ccount = CountC(letter);
ia = SearchA(letter);
ib = SearchB(letter);
ic = SearchC(letter);
PrintResult(letter, acount, bcount, ccount, ia, ib, ic);
return;
} Some errors i get with my program are:
When reading in the letters to store into the array, I get the last letter I entered placed into the entire array. Also I believe my code to find the Index is incorrect.
Example Testing: How many letters would you like to read? 3
Enter letter (a, b or c) (# to quit): a
Enter letter (a, b or c) (# to quit): b
Enter letter (a, b or c) (# to quit): c
It prints "There are no a's'" (there should be 1 a at index 0)
"There are no b's" (there should be 1 b at index 1)
and "There are 3 c's, first appearing at index 0" ( there should be 1 c at index 2)
The last thing is that my code for when the user enters "#" that the input of letters would stop and the program would then continue over to the counting and searching part for the letters, my I believe is correct but I get the same problem as stated above where the program takes the character "#" and stores it into the entire array.
Example Testing:How many letters would you like to read? 3
Enter letter (a, b or c) (# to quit): a
Enter letter (a, b or c) (# to quit): #
It prints "There are no a's'" (should have been 1 a at index 0)
"There are no b's"
and "There are no c's"
Can someone please help me??? or does anyone have a program simular to this they have done and would'nt mind showing me how it works?
Thanks
lou87.Without thinking too much...something like this
for(int start = 0; start < size; start++) {
System.out.println("Please enter a letter (a, b or c) ("+size+" max), enter # to stop:");
input = Keybd.in.readChar();
while((input != 'a') && (input != 'b') && (input != 'c') && (input != '#')) {
Screen.out.println("Invalid Input");
System.out.println("Please enter a letter (a, b or c) ("+size+" max, enter # to stop:");
input = Keybd.in.readChar();
if(input == '#') {
break;
letter[start] = input;
}you dont even need to do start = size; coz with the break you go out of the for loop. -
Hi, I'm not sure if I'm allowed to post questions on this forum but I can't find anywhere to talk to helpful people about programming.
I'm making a dnd interface for JComponents. So far I've made a simple program that has a Component that can be lifted from a container and braught to the glass pane then later moved to anywhere on the screen and dropped into the container below it. Here's where my problems come:
1) Rite now my 'Movable Component' is a JPanel which is just colored in. I want to either take a Graphic2d from a JComponent/Component and draw it on the JPanel or change the JPanel to the component I want to paint and disable the component.
The problem with getting the Graphics2d is that if the component isn't on the screen it doesn't make a graphic object. I tried messing with the ui delicate and overriding parental methods for paintComponent, repaint, and that repaintChildren(forget name) but I haven't had luck getting a good graphics object. I was thinking of, at the beginning of running the program, putting 1 of each component onto the screen for a second then removing it but I'd rather not. I'd also like to change the graphics dynamicly if someone stretches the component there dropping and what not.
The problem with disabling is that it changes some of the visual features of Components. I want to be able to update the Component myself to change how it looks and I don't want disabling to gray out components.
I mainly just dont want the components to do any of there normal fuctions. This is for a page builder, by the way.
Another problem I'm having is that mouseMotionListener is allowing me to select 2 components that are on top of one another when there edges are near each other. I don't know if theres a fix to this other than changing the Java Class.
My next problem is a drop layout manager, but I'm doing pretty good with that rite now. It'll problem just move components out of the way of the falling component.
One last thing I need help with is that I don't want the object that's being carried to go across the menu bar and certain areas. When I'm having the object being carried I have it braught up to the glass pane which allows it to move anywhere. Does anyone have any idea how I could prevent the component from being over the menu bars and other objects? I might have to make 1 panel is the movable area that can then be broken down into the 'component bank', 'building page' and whatever else I'm gonna need.
This is all just test code to get together for when I make the real program but I need to make sure it'll be possible without a lot of hacking of code.
Sorry for the length. Thanks for any help you can give.The trick to making viewable components that have no behaviour, is to render them onto an image of some sort (eg a BufferedImage). You can then display the Image on a JLabel that can be dragged around the desktop.
Here is a piece of code that does the component rendering for you. This particular example uses a fixed component size, but you can modify that as you choose of course...public class JComponentImage
private static GraphicsConfiguration gConfig;
private static Dimension compSize = new Dimension(80, 22);
private static Image image = null;
public static Image getImage(Class objectClass)
if (gConfig == null)
GraphicsEnvironment gEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gDevice = gEnv.getDefaultScreenDevice();
gConfig = gDevice.getDefaultConfiguration();
image = gConfig.createCompatibleImage(compSize.width, compSize.height);
JComponent jc = (JComponent) ObjectFactory.instantiate(objectClass);
jc.setSize(compSize);
Graphics g = image.getGraphics();
g.setColor(Color.LIGHT_GRAY);
g.fillRect(0, 0, compSize.width, compSize.height);
g.setColor(Color.BLACK);
jc.paint(g);
return image;
}And here is the class that makes the dragable JLabel using the class above...public class Dragable extends JLabel
private static DragSource dragSource = DragSource.getDefaultDragSource();
private static DragGestureListener dgl = new DragMoveGestureListener();
private static TransferHandler th = new ObjectTransferHandler();
private Class compClass;
private Image image;
Dragable(Class compClass)
this.compClass = compClass;
image = JComponentImage.getImage(compClass);
setIcon(new ImageIcon(image));
setTransferHandler(th);
dragSource.createDefaultDragGestureRecognizer(this,
DnDConstants.ACTION_COPY,
dgl);
public Class getCompClass()
return compClass;
}Oh and here is ObjectFactory which simply instantiates Objects of a given class and sets their text to their classname (very crudely)...public class ObjectFactory
public static Object instantiate(Class objectClass)
Object o = null;
try
o = objectClass.newInstance();
catch (Exception e)
System.out.println("ObjectFactory#instantiate: " + e);
String name = objectClass.getName();
int lastDot = name.lastIndexOf('.');
name = name.substring(lastDot + 1);
if (o instanceof JLabel)
((JLabel)o).setText(name);
if (o instanceof JButton)
((JButton)o).setText(name);
if (o instanceof JTextComponent)
((JTextComponent)o).setText(name);
return o;
}Two more classes required by this codepublic class ObjectTransferHandler extends TransferHandler {
private static DataFlavor df;
* Constructor for ObjectTransferHandler.
public ObjectTransferHandler() {
super();
try {
df = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType);
} catch (ClassNotFoundException e) {
Debug.trace(e.toString());
public Transferable createTransferable(JComponent jC) {
Transferable t = null;
try {
t = new ObjectTransferable(((Dragable) jC).getCompClass());
} catch (Exception e) {
Debug.trace(e.toString());
return t;
public int getSourceActions(JComponent c) {
return DnDConstants.ACTION_MOVE;
public boolean canImport(JComponent comp, DataFlavor[] flavors) {
if (!(comp instanceof Dragable) && flavors[0].equals(df))
return true;
return false;
public boolean importData(JComponent comp, Transferable t) {
JComponent c = null;
try {
c = (JComponent) t.getTransferData(df);
} catch (Exception e) {
Debug.trace(e.toString());
comp.add(c);
comp.validate();
return true;
public class ObjectTransferable implements Transferable {
private static DataFlavor df = null;
private Class objectClass;
ObjectTransferable(Class objectClass) {
try {
df = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType);
} catch (ClassNotFoundException e) {
System.out.println("ObjectTransferable: " + e);
this.objectClass = objectClass;
* @see java.awt.datatransfer.Transferable#getTransferDataFlavors()
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { df };
* @see java.awt.datatransfer.Transferable#isDataFlavorSupported(DataFlavor)
public boolean isDataFlavorSupported(DataFlavor testDF) {
return testDF.equals(df);
* @see java.awt.datatransfer.Transferable#getTransferData(DataFlavor)
public Object getTransferData(DataFlavor arg0)
throws UnsupportedFlavorException, IOException {
return ObjectFactory.instantiate(objectClass);
}And of course the test class:public class DragAndDropTest extends JFrame
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
Container contentPane = getContentPane();
Dragable dragableJLabel;
Dragable dragableJButton;
Dragable dragableJTextField;
Dragable dragableJTextArea;
* Constructor DragAndDropTest.
* @param title
public DragAndDropTest(String title)
super(title);
dragableJLabel = new Dragable(JLabel.class);
dragableJButton = new Dragable(JButton.class);
dragableJTextField = new Dragable(JTextField.class);
dragableJTextArea = new Dragable(JTextArea.class);
leftPanel.setBorder(new EtchedBorder());
BoxLayout boxLay = new BoxLayout(leftPanel, BoxLayout.Y_AXIS);
leftPanel.setLayout(boxLay);
leftPanel.add(dragableJLabel);
leftPanel.add(dragableJButton);
leftPanel.add(dragableJTextField);
leftPanel.add(dragableJTextArea);
rightPanel.setPreferredSize(new Dimension(500,500));
rightPanel.setBorder(new EtchedBorder());
rightPanel.setTransferHandler(new ObjectTransferHandler());
contentPane.setLayout(new BorderLayout());
contentPane.add(leftPanel, "West");
contentPane.add(rightPanel, "Center");
public static void main(String[] args)
JFrame frame = new DragAndDropTest("Drag and Drop Test");
frame.pack();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setVisible(true);
}I wrote this code some time ago, so it won't be perfect but hopefully will give you some good ideas.
Regards,
Tim -
Need help with a simple program (should be simple anyway)
I'm (starting to begin) writing a nice simple program that should be easy however I'm stuck on how to make the "New" button in the file menu clear all the fields. Any help? I'll attach the code below.
====================================================
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Message extends JFrame implements ActionListener {
public void actionPerformed(ActionEvent evt) {
text1.setText(" ");
text2.setText("RE: ");
text3.setText(" ");
public Message() {
super("Write a Message - by Kieran Hannigan");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(370,270);
FlowLayout flo = new FlowLayout(FlowLayout.RIGHT);
setLayout(flo);
//Make the bar
JMenuBar bar = new JMenuBar();
//Make "File" on Menu
JMenu File = new JMenu("File");
JMenuItem f1 = new JMenuItem("New");f1.addActionListener(this);
JMenuItem f2 = new JMenuItem("Open");
JMenuItem f3 = new JMenuItem("Save");
JMenuItem f4 = new JMenuItem("Save As");
JMenuItem f5 = new JMenuItem("Exit");
File.add(f1);
File.add(f2);
File.add(f3);
File.add(f4);
File.add(f5);
bar.add(File);
//Make "Edit" on menu
JMenu Edit = new JMenu("Edit");
JMenuItem e1 = new JMenuItem("Cut");
JMenuItem e2 = new JMenuItem("Paste");
JMenuItem e3 = new JMenuItem("Copy");
JMenuItem e4 = new JMenuItem("Repeat");
JMenuItem e5 = new JMenuItem("Undo");
Edit.add(e5);
Edit.add(e4);
Edit.add(e1);
Edit.add(e3);
Edit.add(e2);
bar.add(Edit);
//Make "View" on menu
JMenu View = new JMenu("View");
JMenuItem v1 = new JMenuItem("Bold");
JMenuItem v2 = new JMenuItem("Italic");
JMenuItem v3 = new JMenuItem("Normal");
JMenuItem v4 = new JMenuItem("Bold-Italic");
View.add(v1);
View.add(v2);
View.add(v3);
View.addSeparator();
View.add(v4);
bar.add(View);
//Make "Help" on menu
JMenu Help = new JMenu("Help");
JMenuItem h1 = new JMenuItem("Help Online");
JMenuItem h2 = new JMenuItem("E-mail Programmer");
Help.add(h1);
Help.add(h2);
bar.add(Help);
setJMenuBar(bar);
//Make Contents of window.
//Make "Subject" text field
JPanel row2 = new JPanel();
JLabel sublabel = new JLabel("Subject:");
row2.add(sublabel);
JTextField text2 = new JTextField("RE:",24);
row2.add(text2);
//Make "To" text field
JPanel row1 = new JPanel();
JLabel tolabel = new JLabel("To:");
row1.add(tolabel);
JTextField text1 = new JTextField(24);
row1.add(text1);
//Make "Message" text area
JPanel row3 = new JPanel();
JLabel Meslabel = new JLabel("Message:");
row3.add(Meslabel);
JTextArea text3 = new JTextArea(6,22);
messagearea.setLineWrap(true);
messagearea.setWrapStyleWord(true);
JScrollPane scroll = new JScrollPane(text3,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
//SpaceLine
JPanel spaceline = new JPanel();
JLabel spacer = new JLabel(" ");
spaceline.add(spacer);
row3.add(scroll);
add(row1);
add(row2);
add(spaceline);
add(spaceline);
add(row3);
setVisible(true);
public static void main(String[] arguments) {
Message Message = new Message();
}persiandude wrote:
Topic: Need help with if, else, and which statements and loops.
How would I display 60 < temp. <= 85 in java
System.out.println("60 < temp. <= 85 in java");
another question is how do I ask a question like want to try again (y/n) after a output and asking that everytime I type in yes after a output and terminate when saying No.Sun's [basic Java tutorial|http://java.sun.com/docs/books/tutorial/]
Sun's [New To Java Center|http://java.sun.com/learning/new2java/index.html].Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
[http://javaalmanac.com|http://javaalmanac.com]. A couple dozen code examples that supplement [The Java Developers Almanac|http://www.amazon.com/exec/obidos/tg/detail/-/0201752808?v=glance].
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's [Thinking in Java|http://mindview.net/Books/DownloadSites] (Available online.)
Joshua Bloch's [Effective Java|http://www.amazon.com/Effective-Java-2nd-Joshua-Bloch/dp/0321356683/ref=pd_bbs_1?ie=UTF8&s=books&qid=1214349768&sr=8-1]
Bert Bates and Kathy Sierra's [Head First Java|http://www.amazon.com/exec/obidos/tg/detail/-/0596004656?v=glance].
James Gosling's [The Java Programming Language|http://www.bookpool.com/sm/0321349806]. -
I need help removing a malicious program form my mac!
Hello, I am 99% sure I accidentally acquired/downloaded a malicious program on my mac and I am new to macs and need help removing it!
I have growl and the other day it notified me that screen sharing, file sharing and web sharing were all turned on at once. As soon as I saw this I quickly got off of the internet and found out how to disable them.
Also, three programs kept requesting to access the internet and I denied them of course. Their names were: nmbd, netsessionmac1225fd0, and krb5kdc.
Like I said I am new to macs and need some help fixing this problem. So, if anyone has any ideas that would help a lot.
I already have screen sharing, file sharing, and web sharing turned off and now it requires a password to access (which i changed after i disabled them) but I want to ask some mac people if I need to do anything else, thanks!By the way, a big thank you to everyone who has helped so far..
Here is the list of my running programs and keep in mind that I do have my firewall turned on as well as file sharing, screen sharing, and web sharing turned off so the suspect program may not be running?
1905 Activity Monitor MattBurke 2.5 2 28.8 MB Intel (64 bit)
1915 activitymonitord root 0.7 1 1.2 MB Intel (64 bit)
1890 AirPort Base Station Agent MattBurke 0.0 4 3.8 MB Intel (64 bit)
2038 AppleSpell.service MattBurke 0.0 2 6.1 MB Intel (64 bit)
59 autofsd root 0.0 2 664 KB Intel (64 bit)
64 avgconfigd root 0.0 4 2.7 MB Intel (64 bit)
65 avgd root 0.0 8 4.5 MB Intel (64 bit)
136 avglnsd root 0.0 7 14.6 MB Intel (64 bit)
63 avgnotifyd root 0.0 7 4.3 MB Intel (64 bit)
181 avgsched root 0.0 6 4.0 MB Intel (64 bit)
16 blued root 0.0 2 2.7 MB Intel (64 bit)
15 configd root 0.0 7 3.1 MB Intel (64 bit)
137 coreaudiod _coreaudiod 0.0 3 5.2 MB Intel (64 bit)
21 coreservicesd root 0.0 4 50.7 MB Intel (64 bit)
3787 cupsd root 0.0 3 2.8 MB Intel (64 bit)
148 cvmsServ root 0.0 1 692 KB Intel (64 bit)
11 DirectoryService root 0.0 5 7.0 MB Intel (64 bit)
14 diskarbitrationd root 0.0 2 1.6 MB Intel (64 bit)
3726 diskimages-helper MattBurke 0.0 3 12.3 MB Intel (64 bit)
17 distnoted daemon 0.0 2 1.4 MB Intel (64 bit)
1872 Dock MattBurke 0.1 3 32.4 MB Intel (64 bit)
53 dynamic_pager root 0.0 1 444 KB Intel (64 bit)
3705 FanControlDaemon root 0.0 2 1.5 MB Intel
1874 Finder MattBurke 0.0 6 134.2 MB Intel (64 bit)
3332 Firefox MattBurke 3.1 27 247.6 MB Intel
1878 fontd MattBurke 0.0 2 3.9 MB Intel (64 bit)
51 fseventsd root 0.0 13 2.6 MB Intel (64 bit)
1904 gfxCardStatus MattBurke 0.0 2 5.6 MB Intel (64 bit)
1955 Growl Menu MattBurke 0.0 2 7.7 MB Intel (64 bit)
1924 GrowlHelperApp MattBurke 0.0 5 13.8 MB Intel (64 bit)
3732 hdiejectd root 0.0 2 1.6 MB Intel (64 bit)
50 hidd root 0.7 4 1.8 MB Intel (64 bit)
1901 HP Event Handler MattBurke 0.0 4 7.3 MB Intel (64 bit)
0 kernel_task root 1.6 79 172.1 MB Intel
48 KernelEventAgent root 0.0 3 712 KB Intel (64 bit)
10 kextd root 0.0 2 3.8 MB Intel (64 bit)
37 krb5kdc root 0.0 2 1,020 KB Intel (64 bit)
1 launchd root 0.0 3 1.4 MB Intel (64 bit)
193 launchd MattBurke 0.0 2 1.0 MB Intel (64 bit)
1894 LinkScanner Agent MattBurke 0.0 8 9.3 MB Intel (64 bit)
1893 Loader Agent MattBurke 0.0 2 3.8 MB Intel (64 bit)
1853 loginwindow MattBurke 0.0 2 12.7 MB Intel (64 bit)
1909 Logitech Control Center Daemon MattBurke 0.0 4 6.9 MB Intel
18 mDNSResponder _mdnsresponder 0.0 3 2.3 MB Intel (64 bit)
46 mds root 0.1 5 99.4 MB Intel (64 bit)
3712 mdworker MattBurke 0.0 3 11.6 MB Intel (64 bit)
3717 mdworker _spotlight 0.0 3 21.4 MB Intel (64 bit)
1897 netsessionmac1225fd0 MattBurke 0.3 8 3.7 MB Intel
12 notifyd root 0.0 2 556 KB Intel (64 bit)
35 ntpd root 0.0 1 760 KB Intel (64 bit)
1875 pboard MattBurke 0.0 1 504 KB Intel (64 bit)
175 prldispservice root 0.1 15 8.0 MB Intel
147 prl_naptd root 0.0 3 3.0 MB Intel
1908 RescueTime MattBurke 0.3 7 11.6 MB Intel
24 securityd root 0.0 2 3.6 MB Intel (64 bit)
62 sh root 0.0 1 304 KB Intel (64 bit)
66 socketfilterfw root 0.0 3 7.2 MB Intel (64 bit)
13 syslogd root 0.0 4 752 KB Intel (64 bit)
40 SystemStarter root 0.0 2 656 KB Intel (64 bit)
1873 SystemUIServer MattBurke 0.0 4 22.9 MB Intel (64 bit)
1907 Temperature Monitor Lite MattBurke 0.9 4 6.0 MB Intel
1949 usbmuxd _usbmuxd 0.0 3 1.2 MB Intel (64 bit)
1883 UserEventAgent MattBurke 0.0 3 5.3 MB Intel (64 bit)
1854 WindowServer _windowserver 1.3 7 76.0 MB Intel (64 bit) -
I need help on a basic program
Hey people I need bit of help writting a very basic program for a project due on wednesday of this week. I am new at this I wanted to see if I could get some help from you.
I need basically to write a program that when you insert the year of birth it displays the chinease symbol or charater corresponding to the chinease horoscope, for example if I was born in 1982, my ymbol will be the dog... each animal repeats each 12 years, and there are 12 animals,,, some friends told me to do it with a do while, but as I am trying, it does not work that well or I don't do it well, ejejeje
Please help me
Juan AntonioIf you show us what you've done you are more likely to get help.
I don't think you need loops, have you been taught about the modulus operator "%" ? -
Need help with spell checker program
Hi
I am writing a spell checker program and need help for a simple logic.I have "List" of correctly spelled words and a String array of wrong spelled words.How can I compare both and tell that for eg xyz word is not spelled correctly.BigDaddyLoveHandles wrote:
To learn more about Map, take the collection tutorial: [http://java.sun.com/docs/books/tutorial/collections/index.html]
(Actually, to me it sounds like you have a Set of correctly spelled words and another Set of words which may or may not be correctly spelled, and you want the difference...)That is what it sounds like to me also, and that is easy.
JSG -
I need help in making the programe which updates our code into client machi
I need help in making the programme which updates our code into client machine from the server.
As yahoo messanger does if there is any updated version of yahoo messanger.
It asks when we login into it do you want to update new version of yahoo messanger
It automatically updates it
Need Help??Sounds to me like you need Java Web Start.
-
Need help with accessing the program.
I need help with accessing my adobe creative cloud on my windows 8.1 laptop. I have an account but do not have an app. I need this for my online classes. Please help!
Link for Download & Install & Setup & Activation may help
-Chat http://www.adobe.com/support/download-install/supportinfo/ -
Need Help in Writing a program using a two-dimensional Array
I need to write a program that takes 16 integers as inputs and determine whether the square is a magic square(sum of each row, column, and diagonal is the same constant) and display the result in a message Box. Please Help!!!!!
stick the 16 ints in an int[4][4] and then just write the methods. i guess thats the hard part though. the most cumbersome and longest possible way to do it is just write everything out. ie if(int[1][1] + int[2][1] + int[3][1] etc...). a better way would be to use a bunch or for loops, but you'll have to figure that out yourself.
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