一个Java线程调度的问题，运行多次，三个线程打印字符 a b 和数字总是先输出完字母，再输出数字是为什么
class PrintChar implements Runnable{
private char charToPrint;
private int times;
public PrintChar(char c,int t){
charToPrint=c;
times=t;
}
@Override
public void run() {
for(int i=0;i<times;i++){
System.out.print(charToPrint);
}
}
}
class PrintNum implements Runnable{
private int lastNum;
public PrintNum(int n){
lastNum=n;
}
@Override
public void run() {
for(int i=0;i<=lastNum;i++){
System.out.print(" "+i);
}
}
}
public class TaskThreadDemo {
public static void main(String[] args) {
Runnable printA=new PrintChar('a',100);
Runnable printB=new PrintChar('b',100);
Runnable print100=new PrintNum(100);
Thread thread1=new Thread(printA);
Thread thread2=new Thread(printB);
Thread thread3=new Thread(print100);
thread1.start();
thread2.start();
thread3.start();
}
}
