HELP ME PLEASE, i'm desperate.
I bought my MacBook Pro 7 months ago, and a few weeks ago i've been worried about my laptop; it's to slow, and when i'm playing music in iTunes it plays and pause suddenly and the rainbow circle always shows, so i changed one of the 2gb RAM memorie for one of 4GB, so now i got 6GB, at the the begginin it seemed to work well but now i've seen all these issues in my laptop and i don't know what to do, i deleted lots of thing i had thinking it was the memories space, but it was not the problem; i reinstalled Mac Os X Lion and it continues being slow, it takes long time to get to many websites too. HELP ME PLEASE, i can not even listen music well!
Thanks.
From Bogotá, Colombia.
Juan David
There are many possible reasons for a Mac to slow down. Allan has suggested one... you need to keep roughly 10% or more of your hard drive free, or performance will suffer.
Regarding the RAM, although Bimmer is correct that the RAM works best when installed in matching pairs, the difference in modern Macs is apparently not significant. And since the problem was present before you made that change, it's not likely to be a major contributor.
Third-party software could also be an issue. Try rebooting in safe mode. If the problem goes away, only to come back again when you reboot normally, you've got something installed that is causing the problem. (The trick will be finding it!)
There's information on all this and more in my Mac Performance Guide.
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Now to your issue...
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Hello again:
Please run my coding first, and get some view from my coding.
I want to add a table(it is from TableRenderDemo) to a JFrame when I click on the button(from DrawCalendar) of the numer 20, and I want the table disply under the buttons(from DrawCalendar), and the table & buttons all appear on the frame. I added some code for this problem(in the EventHander of the DrawCalendar class), but I do
not known why it can not work.Please help me to solve this problem.
Can anyone help me, please.
Thanks.
*This program for add some buttons to JPanel
*and add listeners to each button
*I want to display myTable under the buttons,
*when I click on number 20, but why it doesn't
*work, The coding for these part are indicated by ??????????????
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class DrawCalendar extends JPanel {
private static DrawCalendar dC;
private static TestMain tM;
private static TableRenderDemo myTable;
private static GridLayout gL;
private static final int nlen = 35;
private static String names[] = new String[nlen];
private static JButton buttons[] = new JButton[nlen];
public DrawCalendar(){
gL=new GridLayout(5,7,0,0);
setLayout(gL);
assignValues();
addJButton();
registerListener();
//assign values to each button
private void assignValues(){
names = new String[35];
for(int i = 0; i < names.length; i++)
names[i] = Integer.toString(i + 1);
//create buttons and add them to Jpanel
private void addJButton(){
buttons=new JButton[names.length];
for (int i=0; i<names.length; i++){
buttons=new JButton(names[i]);
buttons[i].setBorder(null);
buttons[i].setBackground(Color.white);
buttons[i].setFont(new Font ("Palatino", 0,8));
add(buttons[i]);
//add listeners to each button
private void registerListener(){
for(int i=0; i<35; i++)
buttons[i].addActionListener(new EventHandler());
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
private class EventHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
for(int i=0; i<35; i++){
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
if(i==20){ //???????????
tM=new TestMain(); //???????
tM.c.removeAll(); //??????
tM.c.add(dC); //???????
tM.c.add(myTable); //????
tM.validate();
if(e.getSource()==buttons[i]){
System.out.println("testing " + names[i]);
break;
*This program create a table with some data
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.DefaultCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TableRenderDemo extends JScrollPane {
private boolean DEBUG = true;
public TableRenderDemo() {
// super("TableRenderDemo");
MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(700, 70));//500,70
//Create the scroll pane and add the table to it.
setViewportView(table);
//Set up column sizes.
initColumnSizes(table, myModel);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table.getColumnModel().getColumn(2));
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table, MyTableModel model) {
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
try {
comp = column.getHeaderRenderer().
getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
} catch (NullPointerException e) {
System.err.println("Null pointer exception!");
System.err.println(" getHeaderRenderer returns null in 1.3.");
System.err.println(" The replacement is getDefaultRenderer.");
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues[i],
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.addItem("Speed reading");
comboBox.addItem("Teaching high school");
comboBox.addItem("None");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary ", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), new Boolean(false)}
public final Object[] longValues = {"Angela", "Andrews",
"Teaching high school",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
if (data[0][col] instanceof Integer
&& !(value instanceof Integer)) {
//With JFC/Swing 1.1 and JDK 1.2, we need to create
//an Integer from the value; otherwise, the column
//switches to contain Strings. Starting with v 1.3,
//the table automatically converts value to an Integer,
//so you only need the code in the 'else' part of this
//'if' block.
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(TableRenderDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
*This program for add some buttons and a table on JFrame
import java.awt.*;
import javax.swing.*;
public class TestMain extends JFrame{
private static TableRenderDemo tRD;
private static TestMain tM;
protected static Container c;
private static DrawCalendar dC;
public static void main(String[] args){
tM = new TestMain();
tM.setVisible(true);
public TestMain(){
super(" Test");
setSize(800,600);
//set up layoutManager
c=getContentPane();
c.setLayout ( new GridLayout(3,1));
tRD=new TableRenderDemo();
dC=new DrawCalendar();
addItems();//add Buttons to JFrame
private void addItems(){
c.add(dC); //add Buttons to JFrame
//c.add(tRD); //add Table to JFrameClick Here and follow the steps to configure your Linksys Router with Version FIOS.
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in the previous version of Number, the menu table in table options, there is an option that gives me the option: the Return key moves to next cell. I do not see this option in the new number. can you help me please?
Hi silvano,
If you use a regular pattern when entering values, press enter (return) after entering the last value in a row. That will take you to the first Body Cell of the next row.
Start in Cell B2
1 Tab 2 Tab 3 Enter
4 Tab 5 Tab 6 Enter
7 Tab 8 Tab 9 Enter
Now you are ready to type into B5 .
Another way that some people find easier is to enter one column at a time
Start at B2
1 enter
4 enter
7 enter
etc.
Now start with C2.
Use whatever suits your work flow.
Regards,
Ian. -
Over the last few days I haven't been able to download any app. can any one help me, please ? thank you.
Andrea...
You posted in the "Using Mac App Store" forum but your profile indicates you are using an iPad so that's what I'll try helping you with.
On the iPad tap Settings > General > Reset > Reset Network Settings
Then restart the iPad. Hold the On/Off Sleep/Wake button down until the red slider appears. Slide your finger across the slider to turn off iPhone. To turn iPhone back on, press and hold the On/Off Sleep/Wake button until the Apple logo appears.
If you still can't download apps, the problem may be your Wi-Fi connection > iOS: Troubleshooting Wi-Fi networks and connections -
i just connected my ipod touch 4g to my laptop and there is an update 4.3.3 available i was downloading it and just as it finishes it says your network session has timed out what ca i do? HELP ASAP PLEASE!!!
Try a direct download:
iPod, iPhone and iPad Firmware Download
Manually install it by holding your "Option" key down when clicking on the "Restore" button in iTunes and select the firmware file you downloaded. -
" help me please" I have Windows 7 32 bit installed on my mac pro and Bought Mini DisplayPort to VGA Adapter to connect to lcd tv But it does not work? why? please help me
I have to boot with a Windows
When I use the Mac operating system not have a problem and DisplayPort to VGA Adapter Working properly
why does not work with windows ?
What should I do؟
I'm grateful to give advice
tanks
[email protected]Someone in another section answered this. Thanks.
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