java-help

hello sir, please help me.....the below given is the output.java program
here in this program am using the stmts
ta. append("clustering")
where ta is a textarea created in input.java file.i have designed only one form with button and textarea. on button press this output.java file is called.now i want this output.java file to print in textarea.
now this output.java program is not printing the reult in the textarea.
i feel this output.java file not recognising where ta(text area is) how to solve this...


import javax.swing.*;
import javax.swing.JTextArea.*;
import javax.swing.ScrollPaneLayout.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;

class Output extends JFrame {
//private javax.swing.JTextArea ta;
JTextArea ta=null;
JScrollPane sp=null;
File f=null;
FileOutputStream fos=null;
BufferedOutputStream bos=null;
byte b[],b1[];
Cluster[] clustersOutput=null;
// CURE cure;
ClusterAlgorithm cj=null;
Vector v=null;
public Output(ClusterAlgorithm ca){
// super("Output");

cj=ca;

ta=new JTextArea();
sp=new JScrollPane(ta);

clustersOutput=cj.getClusters();
v=new Vector();

Container c=this.getContentPane();
c.setLayout(null);






// setVisible(true);
v=ReadFile.getDP();

for(int i=0; i<clustersOutput.length; i++,ta.append("\n")){
ta.append("CLUSTER "+(i+1)+"\n");
ta.append("----------------\n");
for(int j=0; j<clustersOutput[i].getClusterSize(); j++){
String s="("+(clustersOutput[i].getDataPoint(j).getX())+","+(clustersOutput[i].getDataPoint(j).getY())+")--"+(v.indexOf(clustersOutput[i].getDataPoint(j))+1)+"--\n";
ta.append(s);
ta.getText();
System.out.println("this is punithaaaaaa");
}
}

if (cj instanceof CURE){
for(int i=0; i<clustersOutput.length; i++,ta.append("\n")){
ta.append("CLUSTER "+(i+1)+" RepPoints\n");
ta.append("-----------------------------\n");
for(int j=0; j<clustersOutput[i].getNoOfRepPoints(); j++){
String s="("+(clustersOutput[i].getRepPoint(j).getX())+","+(clustersOutput[i].getDataPoint(j).getY())+")\n";
ta.append(s);
}
}
}//if
}

public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
/* public void actionPerformed(ActionEvent ae){
if(ae.getSource()==exit){
System.exit(0);
}else if(ae.getSource()==saveOutput){
try{
String s=JOptionPane.showInputDialog(null,"Enter the file name to erite the output","Input",JOptionPane.INFORMATION_MESSAGE);
String s1;
f=new File(s);
fos=new FileOutputStream(f);
bos=new BufferedOutputStream(fos);
int i,j,k;
for(i=0; i<clustersOutput.length; i++){
s="----------------CLUSTER "+(i+1)+"----------------\r\n";
b=s.getBytes();
bos.write(b);
for(j=0; j<clustersOutput[i].getClusterSize(); j++){
s1="(";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
s=""+(clustersOutput[i].getDataPoint(j)).getX();
b=s.getBytes();
bos.write(b);
bos.flush();
s1=",";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
s=""+(clustersOutput[i].getDataPoint(j)).getY()+"--"+(v.indexOf(clustersOutput[i].getDataPoint(j))+1)+"--";
b=s.getBytes();
bos.write(b);
bos.flush();
s1=")\r\n";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
}
System.out.println("Cluster"+(i+1)+"successfully written");
}

if (cj instanceof CURE){
for(i=0; i<clustersOutput.length; i++){
s="----------------CLUSTER "+(i+1)+" RepPoints----------------\r\n";
b=s.getBytes();
bos.write(b);
bos.flush();
for(j=0; j<clustersOutput[i].getNoOfRepPoints(); j++){
s1="(";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
s=""+(clustersOutput[i].getRepPoint(j)).getX();
b=s.getBytes();
bos.write(b);
bos.flush();
s1=",";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
s=""+(clustersOutput[i].getRepPoint(j)).getY();
b=s.getBytes();
bos.write(b);
bos.flush();
s1=")\r\n";
b1=s1.getBytes();
bos.write(b1);
bos.flush();
}
System.out.println("Cluster"+(i+1)+" RepPoints successfully written");
}
}//if CURE
}catch(Exception ex){
ex.printStackTrace();
}
}else if(ae.getSource()==showGraph){
cj.showGraph();
}
}*/
}