//打印无符号整数位
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Java_3 extends JFrame {
public Java_3(){
super( "打印无符号整数位" );
Container c = getContentPane();
c.setLayout( new FlowLayout() );
c.add( new JLabel( "请输入整数: " ) );
final JTextField output = new JTextField( 33 );
JTextField input = new JTextField( 10 );
input.addActionListener(
new ActionListener() {
//*********Found********
public void actionPerformed( ActionEvent e ){
int val = Integer.parseInt(
e.getActionCommand() );
//*********Found********
output.setText( getBits( val ) );
}
}
);
c.add( input );
c.add( new JLabel( "该数的二进制位表示是" ) );
output.setEditable( false );
//*********Found********
c.add( output );
setSize( 720, 70 );
setVisible(true);
}
private String getBits( int value ){
int displayMask = 1 << 31;
StringBuffer buf = new StringBuffer( 35 );
for ( int c = 1; c <= 32; c++ ) {
buf.append(
( value & displayMask ) == 0 ? '0' : '1' );
value <<= 1;
if ( c % 8 == 0 )
buf.append( ' ' );
}
return buf.toString();
}
public static void main( String args[] ){
Java_3 app = new Java_3();
app.addWindowListener(
new WindowAdapter() {
//*********Found********
public void windowClosing( WindowEvent e ){
System.exit( 0 );
}
}
);
}
}