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jAvA 编写一个函数将字符串的第3个,6个,9个等(3...

public static void main(String[] args) { delString("abcdefghijlk"); } public static void delString(String str) { StringBuffer buffer=new StringBuffer(); String s=""; for(int i=2;i

这三个方法要加上static static String strAdd(String str1, String str2) { return str1 + str2; } static String strAdd(int int1, int int2) { return String.valueOf(int1 + int2); } static String strAdd(float flt1, float flt2) { retur...

String str="helloworld"; String subStr1=str.substring(0,2); String subStr2=str.substring(5,str.length()); String newStr=subStr1+subStr2; String subStr3=newStr.substring(3,newStr.length()); String resultStr="12"+subStr3; //最后结果

import java.io.*;public class threeString {public static void main(String[] args) throws Exception {if (!(new File("D:\\threeString\\").isDirectory())) {new File("D:\\threeString\\").mkdir();}File tofile = new File("D:\\threeSt...

完整代码如下: public class TestString { public static String reverse(String s){ char []c=new char[s.length()]; for(int i=0;i

java找出连续出现三次的字符,可以使用正则表达式,如下代码: package com.qiu.lin.he;import java.util.regex.Pattern;public class CeShi {public static void main(String[] args) {// 定义一个字符串String string = "adfaasfwqpkwefapadgj...

1、Java中,截取字符串函数为subString(); 2、使用方法:String name = "zhangsanlisiwangwu".subString(0, 3); 3、即可输出从0到第3个的整串字符串

String str[] = {"abc","def","hhh"}; 或者 String str[] = new String[3]; ------------- public class Test { public static void main(String[] args) { String str[] = {"abc","def","hhh"}; int len = str.length; for(int i=0; i

public static void main(String []a) { System.out.print("输入三个String以空格分隔:\n"); Scanner s = new Scanner(System.in); String [] strings = new String[3]; for(int i = 0;i

以下能匹配,必须是数字3,5,6开头,且以数字3,5,6结尾,中间使用;分割 var regex = /^[356](;[356])*$/;console.log(regex.test('3')); // trueconsole.log(regex.test('3;')); // falseconsole.log(regex.test('35')); // falseconsole.log...

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