java图形界面设计

1.创建一个简单框架：这是一个简单的Frame实例，该实例带有指定的标题，大小和背景颜色

import java.awt.*;public class MyFrame extends Frame{public static void main(String args[]) {    MyFrame fr=new MyFrame("Hello Out There !");fr.setSize(400,200);fr.setBackground(Color.blue);fr.setVisible(true);}public MyFrame(String str) {super(str);}}

执行之后的情况：

2.创建面板：该实例是创建一个黄色的面板，并将该面板加入到一个Frame对象中

import java.awt.*;public class FrameWithPanel extends Frame{public FrameWithPanel(String str){super(str);}public static void main(String args[]){FrameWithPanel fr=new FrameWithPanel("Frame with Panel");Panel pan=new Panel();fr.setSize(300,200);fr.setBackground(Color.blue);fr.setLayout(null);pan.setSize(100,100);pan.setBackground(Color.yellow);fr.add(pan);fr.setVisible(true);}}

执行后的情况：

3.布局

import java.awt.*;public class ExGui{private Frame f;private Button b1;private Button b2;public static void main(String args[]) { ExGui that =new ExGui();that.go();}public void go() {f=new Frame("GUI example");f.setLayout(new FlowLayout());b1=new Button("Press me");b2=new Button("Don't press me");f.add(b1);f.add(b2);f.pack();f.setVisible(true);}}

执行后的情况：

 

4.BorderLayout布局管理器：

import java.awt.*;    public class ExGui2{private Frame f;private Button be,bw,bn,bs,bc;public static void main(String args[]){ExGui2 that=new ExGui2();that.go();}void go(){f=new Frame("Border Layout");be=new Button("East");bs=new Button("South");bw=new Button("West");bn=new Button("North");bc=new Button("Center");f.add(be,"East");f.add(bs,"South");f.add(bw,"West");f.add(bc,"Center");f.setSize(350,200);f.setVisible(true);}}

5.GridLayout布局管理器：、

import java.awt.*;public class GridEx{private Frame f;private Button b1,b2,b3,b4,b5,b6;public static void main(String args[]){GridEx that=new GridEx();that.go();}void go(){   f=new Frame("Grid example");    f.setLayout(new GridLayout(3,2));   b1=new Button("b1");    b2=new Button("b2"); b3=new Button("b3"); b4=new Button("b4");b5=new Button("b5"); b6=new Button("b6");f.add(b1);f.add(b2);f.add(b3);f.add(b4);f.add(b5);f.add(b6);f.pack();f.setVisible(true);}}

执行后的情况：

6.CardLayout布局管理器：

import java.awt.*;import java.awt.event.*;public class CardTest extends MouseAdapter{Panel p1,p2,p3,p4,p5;Label l1,l2,l3,l4,l5;CardLayout myCard;Frame f;public static void main(String args[]) {CardTest ct=new CardTest();ct.init();}public void init() {f=new Frame("Card Test");maCard=new CardLayout();f.setLayout(myCard);p1=new Panel();p2=new Panel();p3=new Panel();p4=new Panel();p5=new Panel();l1=new Label("This is the first Panel");p1.add(l1);p1.setBackground(Color.yellow);l2=new Label("This is the second Panel");p2.add(l2);p2.setBackground(Color.green);l3=new Label("This is the third Panel");p3.add(l3);p3.setBackground(Color.magenta);l4=new Label("This is the fourth Panel");p4.add(l4);p4.setBackground(Color.white);l5=new Label("This is the fifth Panel");p5.add(l5);p5.setBackground(Color.cyan);p1.addMouseListener(this);p2.addMouseListener(this);p3.addMouseListener(this);p4.addMouseListener(this);p5.addMouseListener(this);f.add(p1,"First");f.add(p2,"Second");f.add(p3,"Thirt");f.add(p4,"Fourth");f.add(p5,"Fifth");myCard.show(f,"First");f.setSize(300,200);f.show();}public void mouseClicked(MouseEvent e){myCard.next(f);}}

执行后的情况：

7.构造复杂布局

import java.awt.*;public class ExGui3{private Frame f;private Panel p;private Button bw,bc;private Button bfile,bhelp;public static void main(String args[]) {ExGui3 gui=new ExGui3();gui.go();}public void go() {f=new Frame("GUI example 3");bw=new Button("West");bc=new Button("Work space region");f.add(bw,"West");f.add(bc,"Center");p=new Panel();f.add(p,"North");bfile=new Button("File");bhelp=new Button("Help");p.add(bfile);p.add(bhelp);f.pack();f.setVisible(true);}}

执行后的情况：