SOME COMPUTER STUFF ON C,JAVA,TALLY,BCA,SOLVED PAPERS

//d1.java import java.applet.*; import javax.swing.*; import javax.swing.event.*; import java.awt.event.*; import java.awt.*; import java.io.*; import java.lang.*; public class d1 implements ActionListener { JButton jb; JFrame jf; JTextField jtf; d1() { //frame should always be called first frame(); button(); textfield(); jf.setVisible(true); d2 a=new d2(jb); } public void button() { jb=new JButton(); jf.add(jb,BorderLayout.NORTH); jb.addActionListener(this); } public void textfield() { jtf=new JTextField(); jf.add(jtf,BorderLayout.CENTER); } public void frame() { jf=new JFrame("p2 frame"); jf.setSize(500,500); jf.setDefaultCloseOperation(jf.EXIT_ON_CLOSE); //v. imp line otherwise the swing will not close } public void actionPerformed(ActionEvent ae) { if(ae.getActionCommand().equals(jb.getText())) { } } public static void main(String args[])throws IOException { SwingUtilities.invokeLater( new Runnable() { public v...