public class mainclass extends applet i C tI=new C(this) public void initoi tl start;3 public void paint(graphics g) i g drawString Hello,java", 10, 50);3) class c extends Thread mainclass a C(mainclass b) {a=b;} public void runo i while(truer a repaint; tryisleep (400);} catch(InterruptedException e)0))10 7.2 创建线程的方式 public class mainclass extends Applet { C t1=new C(this); public void init() { t1.start();} public void paint(Graphics g) { g.drawString("Hello,java",10,50);}} class C extends Thread { mainclass a; C(mainclass b) { a=b; } public void run() { while(true){ a.repaint(); try{sleep(400);} catch(InterruptedException e){} }}