createEmptyString()方法用于创建一个空字符串,即返回一个空值字符串""。 isEmptyString(String str)方法用于检测一个字符串是否为空,通过判断字符串的长度是否为0来实现。 insertString(String originalStr, int index, String strToInsert)方法用于在一个字符串中的指定位置插入另一个字符串,通过使用StringBuilder类...
importjava.util.Scanner;// 导入Scanner类以获取用户输入publicclassEmptyStringExample{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);// 创建Scanner对象try{System.out.print("请输入一个字符串: ");// 提示用户输入Stringinput=scanner.nextLine();// 读取用户输入的字符串// 检查输...
AI代码解释 String somePublicNamespace="CAT";Config config=ConfigService.getConfig(somePublicNamespace);//config instance is singleton for each namespace and is never nullString someKey="someKeyFromPublicNamespace";String someDefaultValue="someDefaultValueForTheKey";String value=config.getProperty(someKe...
createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getBackgroun...
publicbooleanadd(Ee){ensureCapacityInternal(size+1);elementData[size++]=e;returntrue;}privatevoidensureCapacityInternal(intminCapacity){if(elementData==DEFAULTCAPACITY_EMPTY_ELEMENTDATA){minCapacity=Math.max(DEFAULT_CAPACITY,minCapacity);}ensureExplicitCapacity(minCapacity);}privatevoidensureExplicitCapacity(int...
/*** 新增文章管理表* @param articleRequest 新增参数*/@RequestMapping(value = "/save", method = RequestMethod.POST)public CommonResult<String> save(@RequestBody @Valid ArticleRequest articleRequest) {if (articleService.create(articleRequest)) {return CommonResult.success();} else {return Common...
* @create2022-08-1010:15*/ publicclassStringTest{ @Test public void test2(){ //通过字面量定义的方式:此时的s1和s2的数据Hadoop声明在方法区中的字符串常量池中 String s1 ="Hadoop"; String s2 ="Hadoop"; //通过new + 构造器的方式:此时的s3和s4保存的地址值,是数据在堆空间中开辟空间以后对应的...
1.1 String的特性 packagecom.xue.java; importjdk.jfr.StackTrace; importorg.junit.Test; /** * String的使用 * @author xinxueqi * @create 2022.04.04 */ publicclassStringTest { /* String:字符串,使用""表示 1. String声明位final,不可被继承 ...
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); String a = new String(); String b = ""; String c = null; testString(a); testString(b); testString(c); ...
String version; Controller @RestControllerpublicclassTestController{@RequestMapping("/test")publicStringcreateUser(@ValidUser user, BindingResult bindingResult){if(bindingResult.hasErrors()){returnbindingResult.getFieldError().getDefaultMessage();