When my thread starts running, at that time keylistener is not working.

Question

when my thread starts running, at that time keylistener is not working.
plz reply me.

Answer 1

//FrameShow.java
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import java.awt.Dimension;
import java.awt.geom.Dimension2D;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import java.util.logging.Level;
import java.awt.event.*;
import java.util.*;
public class FrameShow extends JFrame implements ActionListener,KeyListener
     boolean paused=false;
     JButton stop;
     JButton start;
     JButton exit;
     public IncludePanel CenterPanel;
     public FrameShow()
CenterPanel= new IncludePanel();
          Functions fn=new Functions();
          int height=fn.getScreenHeight();
          int width=fn.getScreenWidth();
          setTitle("Game Assignment--Santanu Tripathy--MCA");
          setSize(width,height);
          setResizable(false);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          show();
          initComponents();
          DefaultColorSet();
          this.addKeyListener(this);
     this.setFocusable(true);
     public void initComponents()
          Container contentpane=getContentPane();
          //Creating Panel For Different Side
          JPanel EastPanel= new JPanel();
          JPanel WestPanel= new JPanel();
          JPanel NorthPanel= new JPanel();
          JPanel SouthPanel= new JPanel();
          //CenterPanel = new IncludePanel();
          //IncludePanel CenterPanel= new IncludePanel();
          EastPanel.setPreferredSize(new Dimension(100,10));
          WestPanel.setPreferredSize(new Dimension(100,10));
          NorthPanel.setPreferredSize(new Dimension(10,100));
          SouthPanel.setPreferredSize(new Dimension(10,100));
          //CenterPanel.setPreferredSize(new Dimension(200,200));
          //Adding Color to the Panels
          NorthPanel.setBackground(Color.green);
          SouthPanel.setBackground(Color.orange);
          CenterPanel.setBackground(Color.black);
          //Creating Border For Different Side
          Border EastBr = javax.swing.BorderFactory.createEtchedBorder(Color.cyan, Color.red);
          Border WestBr = javax.swing.BorderFactory.createEtchedBorder(Color.cyan, Color.red);
          Border NorthBr = javax.swing.BorderFactory.createEtchedBorder(Color.cyan, Color.red);
          Border SouthBr = javax.swing.BorderFactory.createEtchedBorder(Color.cyan, Color.red);
          Border CenterBr = javax.swing.BorderFactory.createEtchedBorder(Color.cyan, Color.red);
          //Creating Components For East Panel
          JLabel left= new JLabel("LEFT");
          JLabel right= new JLabel("RIGHT");
          JLabel rotate= new JLabel("ROTATE");
          left.setForeground(Color.blue);
          right.setForeground(Color.blue);
          rotate.setForeground(Color.blue);
          //Creating Components For West Panel
          ButtonGroup group = new ButtonGroup();
          JRadioButton rb1 = new JRadioButton("Pink",false);
          JRadioButton rb2 = new JRadioButton("Cyan",false);
          JRadioButton rb3 = new JRadioButton("Orange",false);
          JRadioButton _default = new JRadioButton("Black",true);
          rb1.setForeground(Color.pink);
          rb2.setForeground(Color.cyan);
          rb3.setForeground(Color.orange);
          _default.setForeground(Color.black);
          //Creating Components For North Panel
          JLabel name= new JLabel("Santanu Tripathy");
          name.setForeground(Color.blue);
          name.setFont(new Font("Serif",Font.BOLD,30));
          //Creating Components For South Panel
          start = new JButton();
          stop = new JButton();
          exit = new JButton();
          start.setToolTipText("Click this button to start the game");
          start.setFont(new java.awt.Font("Trebuchet MS", 0, 12));
          start.setText("START");
          start.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createEmptyBorder(3, 5, 3, 5), javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED)));
          start.setMaximumSize(new java.awt.Dimension(90, 35));
          start.setMinimumSize(new java.awt.Dimension(90, 35));
          start.setPreferredSize(new java.awt.Dimension(95, 35));
          if(paused)
               stop.setToolTipText("Click this button to pause the game");
          else
               stop.setToolTipText("Click this button to resume the game");
          stop.setFont(new java.awt.Font("Trebuchet MS", 0, 12));
          stop.setText("PAUSE");
          stop.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createEmptyBorder(3, 5, 3, 5), javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED)));
          stop.setMaximumSize(new java.awt.Dimension(90, 35));
          stop.setMinimumSize(new java.awt.Dimension(90, 35));
          stop.setPreferredSize(new java.awt.Dimension(95, 35));
          exit.setToolTipText("Click this button to exit from the game");
          exit.setFont(new java.awt.Font("Trebuchet MS", 0, 12));
          exit.setText("EXIT");
          exit.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createEmptyBorder(3, 5, 3, 5), javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED)));
          exit.setMaximumSize(new java.awt.Dimension(90, 35));
          exit.setMinimumSize(new java.awt.Dimension(90, 35));
          exit.setPreferredSize(new java.awt.Dimension(95, 35));
          //Adding some extra things to the Panels
          group.add(rb1);
          group.add(rb2);
          group.add(rb3);
          group.add(_default);
          //Adding Component into the Panels
          EastPanel.add(left);
          EastPanel.add(right);
          EastPanel.add(rotate);
          WestPanel.add(rb1);
          WestPanel.add(rb2);
          WestPanel.add(rb3);
          WestPanel.add(_default);
          NorthPanel.add(name);
          SouthPanel.add(start);
          SouthPanel.add(stop);
          SouthPanel.add(exit);
          //Adding Border Into the Panels
          EastPanel.setBorder(EastBr);
          WestPanel.setBorder(WestBr);
          NorthPanel.setBorder(NorthBr);
          SouthPanel.setBorder(SouthBr);
          CenterPanel.setBorder(CenterBr);
          //Adding Panels into the Container
          EastPanel.setLayout(new GridLayout(0,1));
          contentpane.add(EastPanel,BorderLayout.EAST);
          WestPanel.setLayout(new GridLayout(0,1));
          contentpane.add(WestPanel,BorderLayout.WEST);
          contentpane.add(NorthPanel,BorderLayout.NORTH);
          contentpane.add(SouthPanel,BorderLayout.SOUTH);
          contentpane.add(CenterPanel,BorderLayout.CENTER);
          //Adding Action Listeners
          rb1.addActionListener(this);
          rb2.addActionListener(this);
          rb3.addActionListener(this);
          _default.addActionListener(this);
          exit.addActionListener(this);
          start.addActionListener(this);
try
          start.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent e )
                    start.setEnabled(false);
CenterPanel.drawCircle();
catch(Exception e)
{System.out.println("Exception is attached with sart button exp = "+e);}
try
          stop.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent e )
                    paused=!paused;
                    if(paused)
                         start.setToolTipText("Click this button to resume the game");
                         stop.setText("RESUME");
                    else
                         start.setToolTipText("Click this button to pause the game");
                         stop.setText("PAUSE");
CenterPanel.pause();
catch(Exception e)
{System.out.println("Exception is attached with sart button exp = "+e);}
     public void DefaultColorSet()
          getContentPane().setBackground(Color.white);
     public void actionPerformed(ActionEvent AE)
          String str=(String)AE.getActionCommand();
          if(str.equalsIgnoreCase("pink"))
               CenterPanel.setBackground(Color.pink);
          if(str.equalsIgnoreCase("cyan"))
               CenterPanel.setBackground(Color.cyan);
          if(str.equalsIgnoreCase("orange"))
               CenterPanel.setBackground(Color.orange);
          if(str.equalsIgnoreCase("black"))
               CenterPanel.setBackground(Color.black);
          if(str.equalsIgnoreCase("exit"))
               System.exit(0);
     public void keyTyped(KeyEvent kevt)
//repaint();
public void keyPressed(KeyEvent e)
          System.out.println("here key pressed");
          //CenterPanel.dec();
     public void keyReleased(KeyEvent ke) {}
}//End of FrameShow.ja
//IncludePanel.java
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.Graphics.*;
import java.awt.Dimension;
import java.awt.geom.Dimension2D;
import java.util.*;
import java.util.logging.Level;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
public class IncludePanel extends JPanel implements Runnable
int x=0,y=0;
int color_1=0;
int color_2=1;
int start=0;
Thread th;
Image red,blue,green,yellow;
java.util.List image;
static boolean PAUSE=false;
     public IncludePanel()
     red= Toolkit.getDefaultToolkit().getImage("red.png");
     blue= Toolkit.getDefaultToolkit().getImage("blue.png");
     green= Toolkit.getDefaultToolkit().getImage("green.png");
     yellow= Toolkit.getDefaultToolkit().getImage("yellow.png");
public void paintComponent(Graphics g)
          super.paintComponent(g);
          draw(g);
public void dec()
     System.out.println("in dec method");
     x=x+30;
public void draw(Graphics g)
          g.setColor(Color.red);
          int xx=0,yy=0;
          for (int row=0;row<=12;row++)
               g.drawLine(xx,yy,180,yy);
               yy=yy+30;
          xx=0;
          yy=0;
          for (int col=0;col<=6;col++)
               g.drawLine(xx,yy,xx,360);
               xx=xx+30;
          if(color_1==0)
               g.drawImage(red, x, y, this);
          else if(color_1==1)
               g.drawImage(blue,x, y, this);
          else if(color_1==2)
               g.drawImage(green,x,y, this);
          else if(color_1==3)
               g.drawImage(yellow,x,y, this);
x=x+30;
          if(color_2==0)
               g.drawImage(red, x, y, this);
          else if(color_2==1)
               g.drawImage(blue,x,y, this);
          else if(color_2==2)
               g.drawImage(green,x,y, this);
          else if(color_2==3)
               g.drawImage(yellow,x,y, this);
x=0;
public void drawCircle( )
     th=new Thread(this);
     th.start();
     public void pause()
          if(PAUSE)
               th.resume();
               PAUSE=false;
               return;
          if(!PAUSE)
          PAUSE=true;
     public synchronized void run()
          Random rand = new Random();
          Thread ani=Thread.currentThread();
          while(ani==th)
               if(PAUSE)
                    th.suspend();
               if(y==330)
                    color_1 = Math.abs(rand.nextInt())%4;
                    color_2 = Math.abs(rand.nextInt())%4;
                    if(color_1==color_2)
                         color_2=(color_2+1)%4;
                    y=0;
               else
                    y=y+30;
               repaint();
               try
                    Thread.sleep(700);
               catch(Exception e)
     }//End of run
i sent two entire program