search

 private void BSearchActionPerformed(java.awt.event.ActionEvent evt) {
     int n=-1;
        String s=null,tem=null;
        if(!TISBN.getText().equals("")){
            n=0;
            tem=TISBN.getText();
        }
        else if(!TSubj.getText().equals("")){
            n=1;
            tem=TSubj.getText();
        }
        else if(!TPubD.getText().equals("")){
            n=2;
            tem=TPubD.getText();
        }
        else if(!TNumP.getText().equals("")){
            n=3;
            tem=TNumP.getText();
        }
        else if(!TName.getText().equals("")){
            n=4;
            tem=TName.getText();
        }
        else if(!TAuth.getText().equals("")){
            n=5;
            tem=TAuth.getText();
        }
        try{
        Scanner input=new Scanner(new FileReader("data.txt"));
                if(n!=-1){
        int flag=0;
        while(input.hasNext()){
           s=input.nextLine();
           String[] a=s.split(" ");
           if(a[n].equals(tem)){
               TISBN.setText(a[0]);
               TSubj.setText(a[1]);
               TPubD.setText(a[2]);
               TNumP.setText(a[3]);
               TName.setText(a[4]);
               TAuth.setText(a[5]);
               ISBN=TISBN.getText();
               flag=1;
               break;
           }

        }
        if(flag==0)
             JOptionPane.showMessageDialog(null, " The Book is Not Found");
      }
                input.close();
        }  catch (FileNotFoundException ex) {
               Logger.getLogger(Frame.class.getName()).log(Level.SEVERE, null, ex);
           }




    }