JAVA入门2--APPLET2

来源：互联网发布：住校必备物品知乎编辑：程序博客网时间：2024/05/22 07:43

习题，输入2个数，如果第一个数是第2个数的倍数，那么为返回true, 否则false。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class J28 extends JApplet implements ActionListener{
       JLabel J1, J2, J3;
       JTextField T1, T2, T3;

       public void init( )
       {
        Container contn = getContentPane();
        contn.setLayout( new FlowLayout( ) );

        J1 = new JLabel( " 1 number ");
        J2 = new JLabel( " 2 number ");
        J3 = new JLabel( " ture or false ");

        T1 = new JTextField( 10 );
        T2 = new JTextField( 10 );
        T2.addActionListener( this );
        T3 = new JTextField( 10 );

        contn.add( J1 );
        contn.add( J2 );
        contn.add( J3 );
        contn.add( T1 );
        contn.add( T2 );
        contn.add( T3 );
        }

        public void actionPerformed( ActionEvent e )
        {
         double m, n;
         m = Double.parseDouble( T1.getText( ) );
         n = Double.parseDouble( T2.getText( ) );
         if( multiple( m, n))
           T3.setText( " true " );
         else
           T3.setText( " false " );
        }

        public boolean multiple( double x, double y )
        {
         if( x % y == 0 )
           return true;
         else
           return false;
        }
}