guiuse.java

来自「一个关于宠物统计的小程序。java编写。可供初学者学习。」· Java 代码 · 共 188 行

JAVA
188 行
字号 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class GUIUse extends JFrame {

	private boolean DEBUG = true;
	private String str2=new String();

	public GUIUse() {

		//首先调用父类JFrame的构造方法生成一个窗口
		super("label"); 

		setLayout(new BorderLayout());

		String labelStr="You like all these animals....";
		final JLabel labelQue=new JLabel(labelStr);

		int numButtons=5;
		final String str1="so, you like: ";
		final JLabel label=new JLabel(str1);

		JCheckBox[] checkBoxs=new JCheckBox[numButtons];
		//对各个复选框选项添加事件监听器
		checkBoxs[0]=new JCheckBox("<html><font color=red>dog</font></html>");
		checkBoxs[0].addActionListener(new ActionListener(){
					public void actionPerformed(ActionEvent e){
						boolean foundIt=false;
						int i=0;
						int lenStr2=str2.length();
						int len="dog".length();
						while((!str2.regionMatches(i,"dog",0,len))&&i<lenStr2){
							i++;
							foundIt=false;
						}
						if(i<lenStr2){
							foundIt=true;
						}
						if(!foundIt){
							str2=str2+"dog ";	
						}
						else{
							StringBuffer temp=new StringBuffer(str2);
							temp.delete(i,i+len);
							str2=new String(temp);
						}
						label.setText(str1+str2);
					}
				});

		checkBoxs[1]=new JCheckBox("<html><font color=yello>cat</font></html>");
		checkBoxs[1].addActionListener(new ActionListener(){
					public void actionPerformed(ActionEvent e){
						boolean foundIt=false;
						int i=0;
						int lenStr2=str2.length();
						int len="cat ".length();
						while((!str2.regionMatches(i,"cat ",0,len))
 											&&i<lenStr2){
							i++;
							foundIt=false;
						}
						if(i<lenStr2){
							foundIt=true;
						}
						if(!foundIt){
							str2=str2+"cat ";
						}
						else{
							StringBuffer temp=new StringBuffer(str2);
							temp.delete(i,i+len);
							str2=new String(temp);
						}
						label.setText(str1+str2);	
					}
				});

		checkBoxs[2]=new JCheckBox("<html><font color=green>rabbit</font></html>");
		checkBoxs[2].addActionListener(new ActionListener(){
					public void actionPerformed(ActionEvent e){
						boolean foundIt=false;
						int i=0;
						int lenStr2=str2.length();
						int len="rabbit ".length();
						while((!str2.regionMatches(i,"rabbit ",0,len))&&i<lenStr2){
							i++;
							foundIt=false;
						}
						if(i<lenStr2){
							foundIt=true;
						}
						if(!foundIt){
							str2=str2+"rabbit ";					 
					}
						else{
							StringBuffer temp=new StringBuffer(str2);
							temp.delete(i,i+len);
							str2=new String(temp);
						}
						label.setText(str1+str2);	
					}
				});

		checkBoxs[3]=new JCheckBox("<html><font color=blue>pig</font></html>");
		checkBoxs[3].addActionListener(new ActionListener(){
					public void actionPerformed(ActionEvent e){
						boolean foundIt=false;
						int i=0;
						int lenStr2=str2.length();
						int len="pig ".length();
						while((!str2.regionMatches(i,"pig ",0,len))&&i<lenStr2){
							i++;
							foundIt=false;
						}
						if(i<lenStr2){
							foundIt=true;
						}
						if(!foundIt){
							str2=str2+"pig ";	
						}
						else{
							StringBuffer temp=new StringBuffer(str2);
							temp.delete(i,i+len);
							str2=new String(temp);
						}
						label.setText(str1+str2);	
					}
				});

		checkBoxs[4]=new JCheckBox("<html><font color=black>bird</font></html>");
		checkBoxs[4].addActionListener(new ActionListener(){
					public void actionPerformed(ActionEvent e){
						boolean foundIt=false;
						int i=0;
						int lenStr2=str2.length();
						int len="bird ".length();
						while((!str2.regionMatches(i,"bird ",0,len))&&i<lenStr2){
							i++;
							foundIt=false;
						}
						if(i<lenStr2){
							foundIt=true;
						}
						if(!foundIt){
							str2=str2+"bird ";
						}
						else{
							StringBuffer temp=new StringBuffer(str2);
							temp.delete(i,i+len);
							str2=new String(temp);
						}
						label.setText(str1+str2);	
					}
				});

		//生成面板
		final JPanel pane1 = new JPanel();
		pane1.add(labelQue);
		//将面板添加入窗口中
		getContentPane().add(pane1,BorderLayout.NORTH);

		final JPanel pane2 = new JPanel();
		for(int i=0;i<numButtons;i++){
			pane2.add(checkBoxs[i]);
		}
		getContentPane().add(pane2,BorderLayout.CENTER);

		JPanel pane3=new JPanel();
		pane3.add(label);
		getContentPane().add(pane3,BorderLayout.SOUTH);


		//生成事件监听器
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}

	public static void main(String[] args) {
		GUIUse frame = new GUIUse();
		frame.pack();
		frame.setVisible(true);
	}
}

guiuse.java - 源码说明

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