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jAvA中定义几个字符串,怎么随机从他们之中取出来

获取输入的值,转为数组,然后再相加。代码如下 Scanner scanner = new Scanner(System.in);System.out.print("输入一个整数:");String num = scanner.nextInt()+""; // 输入整数,转为字符串String[] nums = new String [num.length()];for (i...

import java.util.Scanner;class Test{public static void main(String[] argv){Scanner s = new Scanner(System.in);Integer a = s.nextInt();Integer b = s.nextInt();System.out.println(a+b);}}

public class Test { public static void main(String[] args) { String str="Hello World"; //待判断的字符串 String reg=".* .*"; //判断字符串中是否含有空格 System.out.println(str.matches(reg)); } }

import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class A { public static void main(String[] args) { if(args == null || args.length == 0){ System.out.println("No paramter passed. Java should be r...

import java.util.Scanner; public class NumTest { public static void main(String[] args) { int[] nums=new int[10]; Scanner jin = new Scanner(System.in); for (int i = 0; i < nums.length; i++) { nums[i]=jin.nextInt(); } int smalle...

fscanf(fp,"%d",&a[i]);

这组儿童身高的平均值是:(71+69+68+71+71+78+72+77+71+80)/10=72.8 该组儿童身高方差为:S^2={(71-72.8)^2+(69-72.8)^2+(68-72.8)^2+(71-72.8)^2+(71-72.8)^2+(78-72.8)^2+(72-72.8)^2+(77-72.8)^2+(71-72.8)^2+(80-72.8)^2}/10=14.76 所以标...

按照你的要求编写的Java程序如下: public class FFF { public static void main(String[] args) { try{ double d0=Double.parseDouble(args[0]); double d1=Double.parseDouble(args[1]); if(d1==0)throw new ArithmeticException(); double res...

使用split,把字符串分割到数组中,再做加法 var textA = '123,234,456'; var arr = textA.split(','); var totalSum = 0; for (var i=0;i

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