class JavaTest4_String {

	public static void main(String[] args) {

		String str1 = "IOS,ANDROID,BB,PALNM,WP,SYBIAN";

		String str2 = new String("Str2");

		char[] arr = {'S','t','r','2'};

		String str3 = new String(arr);

		String str4 = "         Jue          ";

		//长度

		System.out.println("长度");

		System.out.println(str1+"\t的长度为："+str1.length());

		System.out.println(str2+"\t的长度为："+str2.length());

		System.out.println(str3+"\t的长度为："+str3.length());

		System.out.println(str4+"\t的长度为："+str4.length());

		System.out.println();

		//拆分

		System.out.println("拆分");

		String[] strarr = str1.split(",");

		for(String s : strarr){

			System.out.print(s+"\t");

		}

		System.out.println();

		System.out.println();

		//查找

		System.out.println("查找");

		System.out.println(str1.indexOf("BB"));

		System.out.println(str1.indexOf("S"));

		System.out.println(str1.indexOf("ZZ"));

		System.out.println();

		//替换

		System.out.println("替换");

		System.out.println(str1.replaceAll("BB","CC"));

		System.out.println(str1.replaceAll(",","|"));

		System.out.println(str1.replaceFirst(",","|"));

		System.out.println();

		//返回字符串的副本，忽略前导空白和尾部空白

		System.out.println("返回字符串的副本，忽略前导空白和尾部空白");

		System.out.println(str4);

		System.out.println(str4.trim());

		System.out.println();

		//相等

		System.out.println("判断字符串相等");

		System.out.println(str2.equals(str3));

		System.out.println(str2==str3);

		System.out.println();

		//换大小写

		System.out.println(str1.toLowerCase());

		System.out.println(str2.toUpperCase());

		System.out.println();

		System.out.println();

	}

}

/*

---------- 运行 ----------

长度

IOS,ANDROID,BB,PALNM,WP,SYBIAN	的长度为：30

Str2	的长度为：4

Str2	的长度为：4

         Jue          	的长度为：22

拆分

IOS	ANDROID	BB	PALNM	WP	SYBIAN	

查找

12

2

-1

替换

IOS,ANDROID,CC,PALNM,WP,SYBIAN

IOS|ANDROID|BB|PALNM|WP|SYBIAN

IOS|ANDROID,BB,PALNM,WP,SYBIAN

返回字符串的副本，忽略前导空白和尾部空白

         Jue

Jue

判断字符串相等

true

false

ios,android,bb,palnm,wp,sybian

STR2

输出完成 (耗时 0 秒) - 正常终止

*/