总结:按照索引substring(2,5);意思是从字符串的索引为2开始(包括)到第6个字符(不包括)的位置的截取部分 package com.s.x; //substring public class Wang { public static void main(String[] args) { String s = "This is my oraginal string"; String s1 = s.substring(2);// substring ()方法是从索引为2开始截取
package test; public class Test { public static void main(String[] args) { final int num2 = Integer.parseInt(args[0]); } } 编译时,会报Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at test.Test.main(Test.java:7) 最终的结论是: 运行时忘了加
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at ExTestDrive.main(ExTestDrive.java:14): 程序代码如下: class MyEx extends Exception{} public class ExTestDrive { public static void main(String[] args) { // TODO Auto-generated me
现在 java 支持 linq 啦.比原生 stream api 更好用,功能更强大.现已发布 version 1.0.1 地址: https://github.com/timandy/linq. API of IEnumerable where select selectMany take takeWhile skip skipWhile join groupJoin orderBy orderByDescending groupBy concat zip distinct union int
import java.lang.reflect.Field; public class Outer {//this$0 public class FirstInner {//this$1 public class SecondInner {//this$2 public class ThirdInner { } } } public static void main(String[] args) throws Exception { //初始化各内外实例 Outer test = new Ou
