//3
interface Animal{
abstract void run();
}
class Bird implements Animal{
public void run() {
System.out.println("Bird测试成功");
}
}
class Fish implements Animal{
public void run() {
System.out.println("Fish测试成功");
}
}
public class Animaljiekou{
public static void main(String[]args) {
Animal p1 = new Bird();
p1.run();
p1 = new Fish();
p1.run();
}
}
//1
import java.util.*;
public class Manager {
private int pre;
private int cur;
public Manager()
{
this.pre = 0;
this.cur = 0;
System.out.println("上月="+pre+" 本月="+cur);
}
public Manager(int pre,int cur)
{
this.pre = pre;
this.cur = cur;
System.out.println("上月="+pre+" 本月="+cur);
}
public int Summation() {
int sum;
sum = pre + cur;
System.out.println("总共"+sum);
return sum;
}
}
public class TestManager {
public static void main(String[] args) {
Manager m1 = new Manager();
Manager m2 = new Manager(15,5);
m1.Summation();
m2.Summation();
}
}
//2
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class UserLogin extends JFrame {
JFrame jf;
JPanel jpanel;
JLabel jl1;
JLabel jl2;
JLabel jl3;
JTextField jt;
JPasswordField jp;
JButton jb1;
JButton jb2;
public void JDialog() {
jf =new JFrame();
jl3 = new JLabel("暂无数据");
jf.setSize(300, 150);
jf.add(jp);
jp.add(jl3);
}
public void CreateJFrame(String title) {
jf = new JFrame(title);
jpanel = new JPanel();
jl1 = new JLabel("用户名"); //标签1
jl2 = new JLabel("密 码"); //标签2
jt = new JTextField(18); //文本框1
jp = new JPasswordField(18); //文本框2
jb1 = new JButton("登录"); //按钮1
jb2 = new JButton("重置"); //按钮2
jf.add(jpanel);
jpanel.add(jl1); //添加到容器
jpanel.add(jt);
jpanel.add(jl2);
jpanel.add(jp);
jpanel.add(jb1);
jb1.addActionListener(new ActionListener() {//给登录按钮添加事件处理
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,"暂无数据");
}
});
jpanel.add(jb2);
jb2.addActionListener(new ActionListener() {//给重置按钮添加事件处理
public void actionPerformed(ActionEvent e) {
jt.setText("");
jp.setText("");
}
});
jf.setVisible(true);//设置窗口可见
jf.setSize(300,150);//设置窗口大小
}
public static void main(String[] args) {
new UserLogin().CreateJFrame("用户登录");
}
}
计算器面板
import java.awt.*;
import javax.swing.*;
import javax.swing.border.Border;
public class Calculator extends JFrame {
public void CreateJFrame(String title) {
JFrame jf;
JPanel jp1 = new JPanel(new GridLayout(5,3,0,0));//新建一个5*3网格布局的面板
JPanel jp2 = new JPanel(new GridLayout(4,1,0,0));//新建一个4*1网格布局的面板
JTextField jt; //声明文本框
String[] button1 = {"1","2","3","4","5","6","7","8","9","0","清空","退格",".","="};
String[] button2 = {"+","-","*","/"};
jf = new JFrame("计算器");//新建窗口
Container c = getContentPane(); //定义一个容器
setLayout(new BorderLayout()); //设定为边界布局
jf.add(c);
c.add(BorderLayout.NORTH,jt = new JTextField(18));//添加文本框
c.add(BorderLayout.CENTER,jp1); //在容器的中间加上面板1
c.add(BorderLayout.EAST,jp2); //在容器的右边加上面板2
for(int i = 0;i<button1.length;i++) { //给面板1循环添加按钮
jp1.add(new JButton(button1[i]));
}
for(int i = 0;i<button2.length;i++) { //给面板2循环添加按钮
jp2.add(new JButton(button2[i]));
}
jf.setVisible(true);//设置窗口可见
jf.setSize(300,300);//设置窗口大小
}
public static void main(String[] args) {
new Calculator().CreateJFrame("计算器");
}
}
转载于:https://www.cnblogs.com/BKKITO/p/11487275.html
相关资源：JAVA上百实例源码以及开源项目
