这次主要练习的是图形用户界面设计，当然也有一些乱起八糟的东西，但主要是Applet的内容。
代码语言：javascript复制// java 序列化与反序列化demo
// 导入反序列化所需要的包
/*
import javax.naming.event.ObjectChangeListener;
import java.io.*;
class user implements java.io.Serializable{
public String name;
public String id;
public void OutInfo(){
System.out.println(this.name this.id);
}
}
public class test {
public static void main(String[] args){
user ldd = new user();
ldd.name = "tommonkey";
ldd.id = "10086";
System.out.println(ldd.id);
try {
// 进行序列化，会在当前目录下生成一个序列化文件
FileOutputStream fileOut = new FileOutputStream("./serial.txt"); // 打开文件流
ObjectOutputStream objOut = new ObjectOutputStream(fileOut); // 创建对象流
objOut.writeObject(ldd); // 输出序列化对象
objOut.close(); // 关闭
fileOut.close();
System.out.println("serial is over!");
// 进行反序列化
user n = null;
FileInputStream fileIn = new FileInputStream("./serial.txt");
ObjectInput objIn = new ObjectInputStream(fileIn);
n = (user) objIn.readObject();
objIn.close();
fileIn.close();
System.out.println(n.name n.id);
}catch (IOException i){
i.printStackTrace();
return;
}catch (ClassNotFoundException a){
System.out.println("Employee class not found");
a.printStackTrace();
return;
}
}
}
*/
// Runtime.getRuntime().exec()：系统命令执行方法
/*
public class test {
public static void main(String[] args) throws Exception{
Runtime.getRuntime().exec("notepad.exe"); // 打开记事本
}
}
*/
// applet,awt-GUI界面响应事件流程demo
// 启动方法，再html页面中设置此class文件的路径名，再cmd启动：AppletViewer ****.html
// html中添加路径的方法：<APPLET CODE="test.class" width=500 height=500></APPLET>
/*
import sun.security.mscapi.CPublicKey;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class test extends Applet implements ActionListener{ // 继承appelt 且实现接口：动作监听
private Button but1,but2;
int button = 0;
public void init(){
but1 = new Button("按钮1");
but2 = new Button("按钮2");
add(but1); // 注册事件监听
add(but2);
but1.addActionListener(this); // 事件监听本对象：but1
but2.addActionListener(this);
}
public void paint(Graphics g){
if(button==1)
g.drawString("事件监听到你选择了按钮1！",10,20);
else if(button==2)
g.drawString("事件监听到你选择了按钮2!",10,20);
}
public void actionPerformed(ActionEvent e){ // 实现动作监听必须要有实现该方法
if(e.getActionCommand().equals("按钮1"))
button = 1;
else if(e.getActionCommand().equals("按钮2"))
button =2;
repaint();
}
}
*/
// applet的文本框textField与文本区textArea演示
/*
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class test extends Applet implements ActionListener,TextListener{
TextArea ta1,ta2; // 创建两个文本区对象
TextField text1; // 创建一个文本框对象
public void init() {
text1 = new TextField("this is textField!", 30);
text1.addActionListener(this);
text1.addTextListener(this);
add(text1);
ta1 = new TextArea("this is textArea!", 100, 100);
ta1.addTextListener(this);
add(ta1);
ta2 = new TextArea("this is orther textArea!", 100, 100);
ta2.addTextListener(this);
add(ta2);
}
public void actionPerformed(ActionEvent e){
ta1.append("we have capture you action event and output here!n");
repaint(); //刷新
}
public void textValueChanged(TextEvent e){
ta2.append("we have capture you action event and output here!n");
repaint();
}
}
*/
// Appl的单选框与列表demo
/*
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class test extends Applet implements ItemListener{
CheckboxGroup cbk;
Checkbox cb1,cb2,cb3,cb4;
Color showColor;
List ls;
String[] colorName={"red","yellow","blue","black"};
String[] setColor={String.valueOf(Color.red), String.valueOf(Color.yellow), String.valueOf(Color.blue), String.valueOf(Color.black)};
int num;
public void init(){
cbk = new CheckboxGroup();
cb1 = new Checkbox("Red",cbk,true);
cb2 = new Checkbox("Yellow",cbk,false);
cb3 = new Checkbox("Blue",cbk,false);
cb4 = new Checkbox("Black",cbk,false);
showColor = Color.red;
cb1.addItemListener(this);
cb2.addItemListener(this);
cb3.addItemListener(this);
cb4.addItemListener(this);
add(cb1);
add(cb2);
add(cb3);
add(cb4);
ls = new List(4,false);
for(int i=0;i<colorName.length;i ){
ls.add(colorName[i]);
}
ls.addItemListener(this);
add(ls);
}
public void itemStateChanged(ItemEvent e){
if (e.getSource() == cb1){
showColor = Color.red; // getSource()方法：返回当前动作所指向的对象，包含对象的所有信息,而getActionCommond()是指当前动作指向的对象的名称
}
if (e.getSource() == cb2){
showColor = Color.yellow;
}
if (e.getSource() == cb3){
showColor = Color.blue;
}
if (e.getSource() == cb4){
showColor = Color.black;
}
// showStatus()方法：打印一行状态信息
showStatus(ls.getSelectedItem() ":序列号为 " ls.getSelectedIndex());
num = ls.getSelectedIndex();
repaint();
}
public void paint(Graphics g){
g.setColor(showColor);
g.fillRect(50,80,50,50);
g.setColor(Color.decode(setColor[num])); // 这里的类型转化出了问题，我没找解决办法
g.fillOval(270,100,50,50);
}
}
*/
// 容器Panel(面板):无边框容器，没有边框，也不能移动，缩放，和关闭，通常作为一个容器组件被加到其他容器中
/*
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class test extends Applet implements ActionListener,ContainerListener{
Button but1,but2;
Label lab1,lab2,lab3,lab4,lab5;
Panel pan1,pan2,pan3,pan4,pan5; // 创建五个panel容器（面板）
public void init(){
pan1 = new Panel();
pan2 = new Panel();
pan3 = new Panel();
pan4 = new Panel();
pan5 = new Panel();
pan1.setBackground(Color.red); // 设置面板背景颜色
pan2.setBackground(Color.yellow);
pan3.setBackground(Color.black);
pan4.setBackground(Color.blue);
pan5.setBackground(Color.green);
lab1 = new Label("this is red panel");
lab2 = new Label("this is yellow panel");
lab3 = new Label("this is black panel");
lab4 = new Label("this is blue panel");
lab5 = new Label("this is green panel");
but1 = new Button("this is button1");
but2 = new Button("this is button2");
pan1.add(lab1); // 将标签添加到panel上
pan2.add(lab2);
pan3.add(lab3);
pan4.add(lab4);
pan5.add(lab5);
pan3.add(but1); // 将按钮添加到panel上
pan4.add(but2);
pan1.add(pan3);
pan2.add(pan4);
add(pan1); // 将panel添加到容器中
add(pan2);
add(pan5);
but1.addActionListener(this);
but2.addActionListener(this);
pan1.addContainerListener(this);
pan2.addContainerListener(this);
}
public void actionPerformed(ActionEvent e){
if (e.getSource() == but1){
pan1.remove(pan3);
showStatus("remove panel3 in panel1");
}else{
pan2.remove(pan4);
showStatus("remove panel4 in panel2");
}
}
public void componentRemoved(ContainerEvent e){
}
public void componentAdded(ContainerEvent e){
}
}
*/
