单元测试

import java.util.Scanner;

public class Largesttest {

public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("请输入要比较数的个数：");
Scanner sc1 = new Scanner(System.in);
int len= sc1.nextInt();
int[]num=new int[len];//申请一个数组存放数据
if(len==0||num==null)
{
System.out.println("没有要比较的数！");
}
else
{
System.out.println("Please input numbers:");
for(int i=0;i<len;i++)
{
try
{
Scanner sc2 = new Scanner(System.in);
num[i]= sc2.nextInt();
}
catch(Exception e)
{
System.out.println("输入有误！");
}

}
System.out.println(Largest(num,len));
}
}
static int Largest(int list[],int length)
{
int i,max=list[0];
for(i=0;i<length;i++)
{
if(list[i]>max)
{
max=list[i];
}
}
return max;
}

}