学Java的进来帮帮忙

2025-01-08 12:29:42
推荐回答(3个)
回答1:

1 Hello world!
2 sum=6
3 循环,分支,顺序
4
public static void main(String[] args){
int i=1,s=0;
while (i<=100){ //当i<=100,继续循环
s += i; //将i累加到s上
i++;
}
System.out.println("100以内自然数的和为:"+s);
}
1
class Test{
public static void main(String[] args){
String[] arr = new String[]{"张三", "男", "09网络1班", "20090523155"};
System.out.println("姓名:"+arr[0] + "\n性别:"+arr[1]+"\n班级:"+arr[2]+"\n学号:"+arr[3]);
}
}
2
class Date{
int year,month,day;
public Date(){
year = 2000;
month = day = 1;
}
public Date(int year, int month, int day){
this.year = year;
this.month = month;
this.day = day;
}
}

回答2:

1.Hello world!
2.sum=7
3.顺序结构,选择结构,循环结构
。。。。。。。

回答3:

你可以拿到机器上跑一下就出来了