Arrays,bubblesort, and binary search

Question

Hi I need help I have been working on this homework assignment for the past week and I can't seem to get it so if anyone can help me to figure out what is wrong I would reall grateful. Thanks ahead of time for the help.
Here is what is required for the assignment and also the errors I am getting.
Thanks!
Write a program that sorts an integer array in ascending order and checks whether an integer entered by user is in the array or not. Please follow the following steps to complete the assignment:
1. Declare and create a one-dimensional array consisting of 20 integers.
2. Read 20 integers from the user to initialize the array. Use input dialog box and repetition statement.
3. Build an output string containing the content of the array.
4. Sort the array in ascending order using bubbleSort( ) and swap( ) methods. Then, append the content of the sorted array to the output string.
5. Read an integer search key from the user;
6. Use binarySearch( ) method to check whether the search key is in the array or not. Then, append the search result to the output string.
7. Display the output string in a message box.
Here is my code
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class SortSearch {
public static void main (String args[])
String input, ouput;
int key;
int index;
int[] array=new int [20];
input=JOptionPane.showInputDialog("Enter 20 Numbers");
for(int counter=0; counter<array.length; counter++)
output+=counter+"\t"+array[counter]+"\n";
array(counter)=Integer.parseInt(input);
JTextArea inputArea=new JTextArea();
outputArea.setText(output);
public void bubblesort(int array2[] )
for(int pass=1; pass<array2.length; pass++){
for(int element=0; element<array2.length-1; element++){
if(array2[element]>array2[element+1])
swap(array2, element, element+1);
public void swap(int array3[], int first, int second)
int hold;
hold=array3[first];
array3[first]=array3[second];
array3[second]=hold;
public void actionPerformed(ActionEvent actionEvent)
String searchKey=actionEvent.getActionCommand();
int element=binarySearch(array, Integer.parseInt(searchKey) );
if(element!=-1)
output.setText("Found value in element " + element);
else
output.setText("Value not found ");
public int binary search(iny array2[], int key)
int low=0;
int high=array2.length-1;
int middle;
while(low<=high){
middle=(low + high)/2;
buildOutput(array2, low, middle, high);
if(key==array[middle] )
return middle;
else if(key<array[middle] )
high=middle-1;
else
low=middle+1
return-1
JOptionPane.showMessageDialog(null, outputArea);
System.exit(0);
} //end main
} //end class
Here is my errors
C:\java>javac SortSearch.java
SortSearch.java:27: illegal start of expression
public void bubblesort(int array2[] )
^
SortSearch.java:20: cannot resolve symbol
symbol : variable output
location: class SortSearch
output+=counter+"\t"+array[counter]+"\n";
^
SortSearch.java:22: cannot resolve symbol
symbol : variable counter
location: class SortSearch
array(counter)=Integer.parseInt(input);
^
SortSearch.java:25: cannot resolve symbol
symbol : variable output
location: class SortSearch
outputArea.setText(output);
^
SortSearch.java:25: cannot resolve symbol
symbol : variable outputArea
location: class SortSearch
outputArea.setText(output);
^
5 errors

Answer 1

I am still having problems.
Here is my code
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class SortSearch {
      public static void main (String args[]){
      String input, output;
      int key;
      int index;
      int[] array=new int [20];
      input=JOptionPane.showInputDialog("Enter 20 Numbers");
      for(int counter=0; counter<array.length; counter++)
        array(counter)=Integer.parseInt(input);
      JTextArea outputArea=new JTextArea();
      outputArea.setText(output);
        public void bubblesort(int array2[] )
          for(int pass=1; pass<array2.length; pass++){
            for(int element=0; element<array2.length-1; element++){
              if(array2[element]>array2[element+1]) 
                swap(array2, element, element+1);
            }  //end inner for
          }  //end outer for
        }  //end bubblesort 
        public void swap(int array3[], int first, int second)
          int hold;
          hold=array3[first];
          array3[first]=array3[second];
          array3[second]=hold;
        }  //end swap
        public void actionPerformed(ActionEvent actionEvent)
          String searchKey=actionEvent.getActionCommand();
          int element=binarySearch(array, Integer.parseInt(searchKey) );
          if(element!=-1)
            outputArea.setText("Found value in element " + element);
          else
            outputArea.setText("Value not found ");
        }  //end actionperformed
        JOptionPane.showMessageDialog(null, outputArea,"Comparisons");       
}  //end classHere is my errors
C:\java>javac SortSearch.java
SortSearch.java:57: <identifier> expected
JOptionPane.showMessageDialog(null, outputArea,"Comparisons");
^
SortSearch.java:57: cannot resolve symbol
symbol : class showMessageDialog
location: class javax.swing.JOptionPane
JOptionPane.showMessageDialog(null, outputArea,"Comparisons");
^
SortSearch.java:19: cannot resolve symbol
symbol : method array (int)
location: class SortSearch
array(counter)=Integer.parseInt(input);
^
SortSearch.java:49: cannot resolve symbol
symbol : variable array
location: class SortSearch
int element=binarySearch(array, Integer.parseInt(searchKey) );
^
SortSearch.java:52: cannot resolve symbol
symbol : variable outputArea
location: class SortSearch
outputArea.setText("Found value in element " + element);
^
SortSearch.java:54: cannot resolve symbol
symbol : variable outputArea
location: class SortSearch
outputArea.setText("Value not found ");
^
6 errors
Thanks ahead of time I still don't understand the stuff so I sometime don't understand what my errors are telling me so that is why I ask for your help so that maybe it will help make sense.