滚动面板 我的java学习之路 ,滚动面板，多线程

package cn.hncu.thead;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Font;

import java.awt.GridLayout;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

public class WelcomeJFrame extends JFrame {

public WelcomeJFrame(String text[]){

super("滚动字");

Dimension dim=getToolkit().getScreenSize();

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.getContentPane().setLayout(new GridLayout(text.length,1));

this.setBounds(dim.width/4, dim.height/4, dim.width/3, (int)(dim.height/2.5));

if(text==null || text.length==0){

this.getContentPane().add(new RollPanel("Welcome"));

}else{

for (int i = 0; i < text.length; i++) {

this.add(new RollPanel(text[i]));

}

}

this.setVisible(true);

}

public static void main(String[] args) {

String text[]={"Welcome","wangjianan","清仓大甩卖","欢迎您"};

new WelcomeJFrame(text);

}

}

class RollPanel extends JPanel implements ActionListener,Runnable{

private TextField textWord ,textSleep,textState;//textWord ,textSleep,textState分别显示内容，速度，状态

private JButton btnStart,btnInterrupt;//启动和终止按钮

private Thread thread;

private long sleeptime=0;

public RollPanel(String text){

this.setLayout(new GridLayout(2,1));

char[] space=new char[25];

java.util.Arrays.fill(space, ' ');//用类全名的方式表示

textWord=new TextField(text+new String(space));

textWord.setFont(new Font("aa",Font.BOLD,20));//设置字体

textWord.setForeground(Color.red);//字体颜色

this.add(textWord);

sleeptime = (int)(Math.random()*100);

JLabel lbSleep=new JLabel("sleep");

JPanel p=new JPanel();

p.setLayout(new FlowLayout(FlowLayout.LEFT));

p.add(lbSleep);

textSleep=new TextField(""+sleeptime);

p.add(textSleep);

textSleep.addActionListener(this);

btnStart=new JButton("启动");

p.add(btnStart);

btnStart.addActionListener(this);

btnInterrupt=new JButton("中断");

btnInterrupt.setEnabled(false);

p.add(btnInterrupt);

btnInterrupt.addActionListener(this);

thread = new Thread(this); //让线程启动后，跑自己当前类中的run()方法

JLabel lbState=new JLabel("状态");

p.add(lbState);

textState=new TextField(""+thread.getState(),15);

textState.setEditable(false);

p.add(textState);

this.add(p);

}

@Override

public void actionPerformed(ActionEvent e) {

if(e.getSource()==btnStart){

try {

sleeptime = Integer.parseInt(textSleep.getText());//更新速度

} catch (NumberFormatException e1) {

JOptionPane.showMessageDialog(this, "\"不能转换,请重新输入");

}

thread=new Thread(this);

thread.start();

textState.setText(""+thread.getState());//获得当前状态

btnInterrupt.setEnabled(true);

btnStart.setEnabled(false);

//textState.setText(""+thread.getState());放此处获得的不是当前状态，因为时间过来

}else if(e.getSource()==btnInterrupt){

thread.interrupt();

textState.setText(""+thread.getState());

btnInterrupt.setEnabled(false);

btnStart.setEnabled(true);

}

if(e.getSource()==textSleep){

try {

sleeptime=Integer.parseInt(""+textSleep.getText());

} catch (NumberFormatException e1) {

JOptionPane.showMessageDialog(this, "\"不能转换,请重新输入");

}

}

}

@Override

public void run() {

while(true){

try {

String str=textWord.getText();

str=str.substring(1)+str.charAt(0);//设置字体滚动

textWord.setText(str);

thread.sleep(sleeptime);//线程在指定的毫秒数内让当前正在执行的线程休眠（暂停执行），

//此操作受到系统计时器和调度程序精度和准确性的影响。

} catch (InterruptedException e) {

break;

}

}

}

}