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));    }}