Can any one help me to solve my prblem

Question

exception java.io.IOException is never thrown in body of corresponding try statement
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import java.util.Date;
import java.io.*;
public class SampleIO2
int[] u= new int[27];
    JFrame f;
    String s1,s2;
    int v1,v2,v3,v4;double v5;
     JButton b1,b2,b3;      
    JTextField []a=new JTextField[27];
    int []p=new int[27];
  JTextField t1,t2,t3,t4,t5,t6,t7,t8;
  JLabel l1,l2;
    public SampleIO2()
        initializeFrame();
        initializeComponents();
        setButtonAction();
        f.show();
    public void initializeFrame()
        f = new JFrame("Kandil Softwares");
        f.setBounds(300,250,700,400);
        f.getContentPane().setLayout(null);
        f.setResizable(false);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().setBackground(Color.GRAY);
    public void initializeComponents()
         Date currentDate = new Date();
         l1= new JLabel("Name                                                                             Salery ");
         l1.setBounds(10,5,385,20);
         f.getContentPane().add(l1);
              l2= new JLabel("Over Time :                   Ins :                      Salf :                       Total :");
         l2.setBounds(5,180,385,20);
         f.getContentPane().add(l2);
          t1 = new JTextField();//total
        t1.setBounds(350,180,100,20);
        f.getContentPane().add(t1);
          t2 = new JTextField();//name
        t2.setBounds(20,30,80,20);
        f.getContentPane().add(t2);
        t3 = new JTextField();//over time
        t3.setBounds(70,180,45,20);
        f.getContentPane().add(t3);
        t4 = new JTextField();//salery
        t4.setBounds(280,30,50,20);
        f.getContentPane().add(t4);
        b1 = new JButton("Cal");
        b1.setBounds(20,300,90,40);
        f.getContentPane().add(b1);
        b2 = new JButton("Save");
        b2.setBounds(130,300,90,40);
        f.getContentPane().add(b2);
        b3 = new JButton("New");
        b3.setBounds(240,300,90,40);
        f.getContentPane().add(b3);
         t5 = new JTextField();//ins
        t5.setBounds(150,180,50,20);
        f.getContentPane().add(t5);
         t6 = new JTextField();//salf
        t6.setBounds(250,180,50,20);
        f.getContentPane().add(t6);
          t7 = new JTextField();
        t7.setBounds(20,225,50,20);
        f.getContentPane().add(t7);
         t8 = new JTextField();
        t8.setBounds(20,250,50,20);
        f.getContentPane().add(t8);
        t1.setEditable(false);
       // f.getContentPane().setBackground(Color.blue);
         int q=60;
         int s=60;
         for(int i=0;i<27;i++){
         a=new JTextField();
          a[i].setBounds(q,s,35,20);
          f.getContentPane().add(a[i]);
          q=q+40;
          if ((i==6)||(i==13)||(i==20)){
          q=60;
     s=s+30;}
public void setButtonAction()
b1.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
     //double[] p = new double[27];
// String[] n = new String[2];
     if (t3.getText().length()==0)
          v5=0;
          else
     v5=Integer.parseInt(t3.getText());
     if (t4.getText().length()==0)
          v2=0;
          else
     v2=Integer.parseInt(t4.getText());
     if (t5.getText().length()==0)
          v3=0;
          else
     v3=Integer.parseInt(t6.getText());
     if (t6.getText().length()==0)
          v4=0;
          else
     v4=Integer.parseInt(t6.getText());
     double disc1=0,disc2=0,disc3=0;
     double late1=0,late2=0,late3=0;
double rus =0;
int x=0,y=0,z=0;
     double sum = 0;
     double sal = v2;
     double hafez =sal*0.05;
     double dsal = sal/30;
for (int i=0 ;i<a.length;i++){
s1 = a[i].getText();
if(s1.length()==0)
     v1=0;
     else if(s1.charAt(0)=='a'){
          x++;}
else if(s1.charAt(0)=='b'){
          y++;}
     else if(s1.charAt(0)=='c'){
          z++;}
     else
     {v1=Integer.parseInt(a[i].getText());}
     int c=0;v1=p[i];     
     double minsal = sal /( 30 * 9 * 60) ;
double latemin = v1;
if (latemin ==0)
     c++;
if ( latemin > 60 )
     late1 = latemin - 60;
     late2 = 30;
     late3 = 30;
else if ( latemin > 30 )
     late1 = 0;
     late2 = latemin - 30;
     late3 = 30 ;
else if (latemin <= 30)
     late1 = 0;
     late2 = 0;
     late3 = latemin;
disc1 = late1 * 3 * minsal;
disc2 = late2 * 2 * minsal;
disc3 = late3 * 1.5 * minsal;
sum = disc1 + disc2 + disc3;
rus = rus + sum;
double ove=v5*1.5*(sal/(30*9));
double c1 = x*1.5*dsal;
     double c2 = y*2*dsal;
     double c3 = z*3*dsal;
     double cs=c1+c2+c3;
double fsalery = sal+ove - (rus+cs+v3+v4);
t1.setText(""+fsalery+" ");
String w1=t2.getText();String w2=t7.getText();
// save(p,w1,w2,v3,v1,v4,v5,fsalery);
b2.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
b3.addActionListener(new ActionListener()
     public void actionPerformed(ActionEvent e)
public static void save(int[] q,String n,String c,int in,int sal,int salf,double over ,double total)throws IOException
     DataOutputStream out = new DataOutputStream(new FileOutputStream("asd.txt"));
try{
int f=0;
}catch(IOException ioe){
ioe.printStackTrace();
for(int i = 0; i < q.length; i ++) {
out.writeInt(q[i]);
out.writeChar('\t');
     out.close();
public static void main(String[] args)
     JFrame f = new JFrame("Hello, World!");
     int y=1;
     /*JLabel myLabel = new JLabel("Hello, World!");
myLabel.setBounds(244, 240, 80, 40);
f.getContentPane().add(myLabel);
f.show();
SampleIO2 g = new SampleIO2();

Answer 1

public static void save(int[] q,String n,String c,int in,int sal,int salf,double over ,double total)throws IOException
         DataOutputStream out = new DataOutputStream(new FileOutputStream("asd.txt"));
       try{
                                                                 int f=0;
}catch(IOException ioe){
        ioe.printStackTrace();
        for(int i = 0; i < q.length; i ++) {
            out.writeInt(q);
out.writeChar('\t');
     out.close();
This section?
Nothing will get thrown because your code that would throw an exception is not in the try. You want to do something like this maybe...
public static void save(int[] q,String n,String c,int in,int sal,int salf,double over ,double total)throws IOException
       DataOutputStream out = null;
       try{
          out = new DataOutputStream (new FileOutputStream ("asd.txt"));
          int f=0;
          for(int i = 0; i < q.length; i ++) {
            out.writeInt(q);
out.writeChar('\t');
     out.close();
}catch(IOException ioe){
ioe.printStackTrace();
if (out != null) { out.close(); }
// note: your declaration has a throws IOException, which means you
// don't need this try catch block here. If you wanted to contain it and add your
// own error message, this would be fine, and you say something along the
// lines of throw new IOException ("An Error Occured"); in the catch section.
//Then your throws IOException in your declaration would make sense. So
// either take out the try catch block, and if an exception is thrown, the calling
// method would have to catch it, keep it to contain it and throw your own error // message or keep it and contain it but take out the throws IOException from // your declaration