JAVA学习--模板方法设计模式

public class TestTemplate {
public static void main(String[] args) {
new SubTemplate().spendTime();
}
}

abstract class Template {

public abstract void code();

public void spendTime() {
long start = System.currentTimeMillis();

this.code();

long end = System.currentTimeMillis();
System.out.println("花费的时间为：" + (end - start));
}
}

class SubTemplate extends Template {

public void code() {
boolean flag = false;
for(int i = 2;i <= 10000;i++){
for(int j = 2;j <= Math.sqrt(i);j++){
if(i % j == 0){
flag = true;
break;
}
}
if(!flag){
System.out.println(i);
}
flag = false;
}
}
}