JAVA水仙花数编程

水仙花数：
import java.awt.*;
import javax.swing.*;
class Demo1 extends JFrame{
JLabel m1;JTextField m2;
Demo1(){
setTitle("the water flower number: ");
m1=new JLabel("All the water flower number ");
m2=new JTextField(20);
FlowLayout f=new FlowLayout();
setLayout(f);
add(m1);
add(m2);
String s="";
for(int n=100;n<1000;n++){
int i=n/100;
int j=n/10%10;
int k=n%10;
if(i*100+j*10+k==i*i*i+j*j*j+k*k*k){
s+=n+" ";
}
}
m2.setText(s);
}
}
public class Demo{
public static void main(String args[]){
Demo1 frame=new Demo1();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,300);
frame.setVisible(true);}}
import java.applet.Applet;
import java.awt.BorderLayout;
import java.util.Date;
import javax.swing.JLabel;
public class Cloc k2 extends Applet {
static final long serialVersionUID = 1L;
String time = null;
JLabel lbshow = null;
public void init() {
lbshow = new JLabel();
time = "Now Time:";
showTime t = new showTime();
t.start();
setLayout(new BorderLayout());
add(lbshow, BorderLayout.CENTER);
}
private class showTime extends Thread {
public void run() {
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
time = "Now Time: " + new Date().toLocaleString();
lbshow.setText(time);
}
}
}
}
实验7-2：线程
package experiment;
class Thread1 implements Runnable{
public void run(){
out:for(int i=2;i<50;i++){
for(int j=2;j<i;j++)if(i%j==0)continue out;
System.out.println(" primenumber "+i);
}
}
}
class Thread2 implements Runnable{
public void run(){
int a=1,b=1,c;
for(int i=1;i<=50;i++){
System.out.println(a);
c=a+b;
a=b;
b=c;
System.out.println("Fibonacci ");
}
}
}
class E7_22{
public static void main(String args[]){
Thread t1=new Thread(new Thread1());
Thread t2=new Thread(new Thread2());
t1.start();
t2.start();
}
}
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class PanelDemo extends JPanel{
PanelDemo(){
repaint();
}
public void paint(Graphics g){
g.drawLine(100,100,150,200);
g.drawString("Hello",50,80);
}
public void paintComponent(Graphics g){
}
public static void main(String args[]){
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame jf=new JFrame("AAA");
jf.add(new PanelDemo(),"Center");
jf.setSize(400,350);
jf.setVisible(true);
}
}。