1、制作一个如图所示的界面（使用FlowLayout布局），不要求实现功能。

package experiment;
import java.awt.FlowLayout;
import javax.swing.*;
public class MyFrame {
    JFrame f;
    JButton b1,b2;
    JLabel l1,l2,l3,l5,l4,l6,l7,l8,l9;
    JPanel p;
    JTextField t1,t2,t3,t4,t5,t6;
    public MyFrame(){
        f=new JFrame("闹钟");
        l1 = new JLabel("当前时间：");
        l2 = new JLabel("时");
        l3 = new JLabel("分");
        l4 = new JLabel("秒");
        l5 = new JLabel("闹钟时间:");
        l6 = new JLabel("时");
        l7 = new JLabel("分");
        l8 = new JLabel("秒");
        l9 = new JLabel("闹钟设置");
        p = new JPanel();
        t1 = new JTextField(7);
        t2 = new JTextField(7);
        t3 = new JTextField(7);
        t4 = new JTextField(7);
        t5 = new JTextField(7);
        t6 = new JTextField(7);
        b1= new JButton("开");
        b2= new JButton("关");
        setLayout(new FlowLayout(2,8,8));
        p.add(l1);
        p.add(t1);
        p.add(l2);
        p.add(t2);
        p.add(l3);
        p.add(t3);
        p.add(l4);
        p.add(l5);
        p.add(t4);
        p.add(l6);
        p.add(t5);
        p.add(l7);
        p.add(t6);
        p.add(l8);
        p.add(l9);
        p.add(b1);
        p.add(b2);
        f.add(p);
        f.setSize(430,200);
        f.setVisible(true);
    }

    private void setLayout(FlowLayout flowLayout) {    
    }
    public static void main(String[] args) {
        new MyFrame();
    }

}

 

2、设计一个用标签、文本行与按钮来登录的界面（用GridLayout布局方式）。如图所示。

 

//流布局
package experiment;
import java.awt.Color;
import javax.swing.*;
public class MyFrame1 {
    JFrame f;
    JButton b1,b2;
    JLabel l1,l2;
    JPanel p;
    JTextField t1,t2;
    public MyFrame1(){
        f=new JFrame("登录");
        l1 = new JLabel("用户名：");
        l2 = new JLabel("口令：");
        p = new JPanel();
        t1 = new JTextField();
        t2 = new JTextField();
        b1= new JButton("确定");
        b2= new JButton("取消");
        p.setLayout( null );
        b1.setBounds(10,200,155,50);
        b2.setBounds(200,200,155,50);
        l1.setBounds(75, 80, 80, 30);
        l2.setBounds(80, 140, 80, 30);
        t1.setBounds(160,82,200,28);
        t2.setBounds(160,140,200,28);
        p.add(t1);
        p.add(t2);
        f.add(p);
        p.add(b1);
        p.add(b2);
        p.add(l1);
        p.add(l2);
        p.setBackground(new Color(210,180,140));
        f.setSize(380,300);
        f.setLocation(700,400);
        f.setVisible(true);
        }

    public static void main(String[] args) {
        new MyFrame1();
    }
}

 

1、设计一个如图所示的界面，不需要提供组件的功能。

 

package experiment;
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.GridLayout;
public class counter {
    JFrame f;
    JButton[] b;
    JTextField t;
    JPanel p;
    GridLayout g;
    String title[]= {"7","8","9","/","4","5","6","*","1","2","3","-","0",".","=","+"};
    public counter() {
         f=new JFrame("计算器");
         p = new JPanel();
         t = new JTextField();
         b= new JButton[title.length];
         g = new GridLayout(4,4);
         p.setLayout(g);
         for(int i=0;i < title.length;i++) {
             b[i]= new JButton(title[i]);
             p.add(b[i]);
         }
         f.add(t,BorderLayout.NORTH);
         f.add(p,BorderLayout.CENTER);
         f.setVisible(true);
         f.setSize(400,300);
         
    }
    public static void main(String[] args) {
        new counter();
    }
}

 

 

2、编写可改变背景颜色的窗口。

 

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main {
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    final JPanel panel = new JPanel();
    frame.setSize(300, 200);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    final JButton redButton = new JButton("Red");
    final JButton greenButton = new JButton("Green");
    final JButton blueButton = new JButton("Blue");
    class Listener extends JPanel implements ActionListener {
      public void actionPerformed(ActionEvent event) {
        Color color;
        if (event.getSource() == redButton) {
          color = Color.red;
          redButton.setBackground(color);
          panel.setBackground(color);
        } else if (event.getSource() == greenButton) {
          color = Color.green;
          greenButton.setBackground(color);
          panel.setBackground(color);
        } else {
          color = Color.blue;
          blueButton.setBackground(color);
          panel.setBackground(color);
        }
        setBackground(color);
        repaint();
      }
    }
    redButton.addActionListener(new Listener());
    greenButton.addActionListener(new Listener());
    blueButton.addActionListener(new Listener());
    panel.add(redButton);
    panel.add(greenButton);
    panel.add(blueButton);
    frame.add(panel);
    frame.setVisible(true);
  }
}

 

package experiment;
import javax.swing.*;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class color implements ActionListener {
    JFrame f;
    JPanel p;
    JButton b1,b2,b3;
    public color() {
         f=new JFrame("window");
         p = new JPanel();
         b1= new JButton("Lavender");
         b2= new JButton("MistyRose");
         b3= new JButton("Honeydew");
         b1.addActionListener(this);
         b2.addActionListener(this);
         b3.addActionListener(this);
         f.add(p);
         p.add(b1);
         p.add(b2);
         p.add(b3);
         p.setBackground(new Color(240,248,255));
         f.setSize(400,300);
         f.setVisible(true);
    }
    public static void main(String[] args) {
        new color();

    }
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==b1)
            p.setBackground(new Color(230,230,250));
        else if(e.getSource()==b2)
            p.setBackground(new Color(255,228,225));
        else if(e.getSource()==b3)
            p.setBackground(new Color(240,255,240));
    }

}