package com.example;

public class StringEqual {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

String strOne="Hello";

String strTwo="hello";

String strThree="Hello";

if (strOne.equals(strThree))

{

System.out.println("strOne and strThree are equal");

}

if (strOne==strThree)//判断java字符串值相等 不能用==

{

System.out.println("strOne and strThree are not equal");

}

if (strOne.equalsIgnoreCase(strTwo))//忽略大小写

{

System.out.println("strOne and strTwo equal");

}

System.out.println(strOne.compareTo(strTwo));//按照字典顺序，在strTwo前返回负数

if(strOne.startsWith("H"))

{

System.out.println("startsWith H");

}

String aa= strOne.replace("He", "哈哈");

System.out.println(aa);//返回新字符串

System.out.println(strOne);

}

}