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right=newRighthand();
left.start();
right.start();
}
}
classLefthandextendsThread
publicvoidrun()
for(inti=0;
i<
=5;
i++)
{
System.out.println("
Iamastudent"
);
try
{
sleep(500);
}
catch(InterruptedExceptione)
}
classRighthandextendsThread
Iamopoookkkkk"
5.线程生命周期
A.new新建
B.start启动/就绪
C.run()运行线程处于自动调用业务逻辑
D.sleep阻塞
E.死亡方法执行完毕实现run()方法
6.调用机制:
同级别的采用先到服务的原则,线程的级别继承父线程(程序的主线程
)主线程一般具有普通优先级
不同级别的按照优先级的顺序
//实现Runnable接口的实例
importjava.applet.*;
importjava.awt.*;
publicclassExample2extendsjava.applet.AppletimplementsRunnable
ThreadcircleThread;
publicvoidstart()
if(circleThread==null)
circleThread=newThread(this);
circleThread.start();
while(circleThread!
=null)
repaint();
try
circleThread.sleep(1000);
catch(InterruptedExceptione)
publicvoidpaint(Graphicsg)
doublei=Math.random();
if(i<
0.5)
g.setColor(Color.red);
else{
g.setColor(Color.black);
g.fillOval(100,100,(int)(100*i),(int)(100*i));
publicvoidstop()
circleThread.yield();
circleThread=null;
newExample2();
//是一个应用程序,这个应用程序在创建窗口的同时有创建一个新的线程,该程序负责让窗口只能够的一个按钮改变他的大小
importjava.awt.event.*;
publicclassExample3
Mywinwin=newMywin();
classMywinextendsFrameimplementsRunnable
Buttonb=newButton("
ok"
intx=5;
Threadbird=null;
Mywin()
setBounds(100,100,120,120);
setLayout(newFlowLayout());
setVisible(true);
add(b);
b.setBackground(Color.green);
bird=newThread(this);
bird.start();
while(true)
x=x+1;
if(x>
100)x=5;
b.setBounds(40,40,x,x);
bird.sleep(200);
catch(InterruptedExceptione){
//滚动字幕线程
publicclassExample4extendsjava.applet.AppletimplementsRunnable
intx=0;
ThreadScrollwords=null;
publicvoidinit()
setBackground(Color.cyan);
setForeground(Color.red);
setFont(newFont("
TimesRman"
Font.BOLD,18));
if(Scrollwords!
Scrollwords=newThread(this);
Scrollwords.start();
while(Scrollwords!
x=x+5;
500)
x=0;
try{Scrollwords.sleep(80);
Scrollwords.yield();
Scrollwords=null;
newExample4();
//带滚动字符的小字典
publicclassExample5extendsAppletimplementsActionListener,Runnable
TextFieldtext1,text2;
ThreadScrollwords=null;
publicvodiinit()
text1=newTextField(10);
text2=newTextField(10);
add(newLabel("
输入一个英文单词:
"
));
add(text1);
汉语意思"
add(text2);
text1.addActionListener(this);
publicvoidstart()
g.drawString("
欢迎使用字典"
x,120));
publicvoidstop()
publicvoidactionPerformed(ActionEvente)
if((e.getSource()==text1)&
&
(text1.getText().equals("
boy"
)))
text2.setText("
男孩"
elseif(e.getSource()==text1)&
sun"
太阳"
else
没有该单词"
newExample5();
//下面是一个左手画圆右手画方的列子,
//我吗在主线程中创建了两个线程,:
left,right,其中一个负责画圆,另一个画方。
在这个列子中我们使用了容器类的方法getGraphics()来获取一个Graphics对象(可以理解一个画笔)
publicclassExample6extendsAppletimplementsRunnable
Threadleft,right;
Graphicsmypen;
intx,y;
left=newThread(this);
right=newThread(this);
x=10;
y=10;
mypen=getGraphics();
if(Thread.currentThread()==left)
x=x+1;
if(x>
240)x=10;
mypen.setColor(Color.blue);
mypen.clearRect(10,10,300,100);
mypen.fillRect(10+x,10,50,50);
try{left.sleep(60);
}
catch(InterruptedExceptione)
{
elseif(Thread.currentThread()==right)
y=y+1;
if(y>
240)y=10;
mypen.setColor(Color.red);
mypen.drawOval(10+y,110,50,50);
try{right.sleep(60);
}
left=null;
right=null;
//下面是一个模拟平抛运动,一个求自由落下一个求同时水平抛出,二者同时落地
publicclassExample7extendsAppletimplementsRunnable
Threadredball,blueball;
GraphicsredPen,bluePen;
intt=0;
redball=newThread(this);
blueball=newThread(this);
redPen=getGraphics();
bluePen=getGraphics();
redball.start();
blueball.start();
t=t+1;
if(Thread.currentThread()==redball)
if(t>
100)t=0;
redPen.clearRect(0,0,110,400);
bluePen.fillOval(50,(int)(1.0/2*t*9.8),50,50);
try{redball.sleep(40);
catch(InterruptedExceptione){
elseif(Thread.currentThread()==blueball)
bluePen.clearRect(120,0,900,500);
bluePen.fillOval(120+7*t,(int)(1.0/2*t*9.8),50,50);
try{blueball.sleep(40);
//点击按钮后,每隔半秒中后就发出嘟的一声
publicclassExamples8extendsAppletimplementsActionListener
Toolkittoolkit;
Buttonbutton;
toolkit=getToolkit();
button=newButton("
确定"
add(button);
button.addActionListener(this);
publicvoidactionPerformed(ActionEventew)
if(ew.getSource()==button)
for(inti=0;
=9;
toolkit.beep();
try
Thread.sleep(500);