Java引用数据类型字符串

String（字符串）：引用数据类型

声明String使用一对双引号

string可以与8中数据类型做运算；且运算只能连接运算运算符+

运算结果也是string类型  ；a = 97

简单示例

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class VariableTest1 {     public static void main(String[] args)     {         String s1 = "chlgg";         System.out.println("Hello world");         System.out.println(s1);       } } ---------- java ---------- Hello world chlgg   输出完成 (耗时 0 秒) - 正常终止

　　字符串拼接

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class VariableTest1 {     public static void main(String[] args)     {         String s1 = "chlgg";         System.out.println("Hello world");         System.out.println(s1);         int number = 1001;         String numberStr = "学号";         String info = numberStr + number;         System.out.println(info);       } }

　　测试

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class VariableTest1 {     public static void main(String[] args)     {         char c = 'a';//a等于97         int num = 10;         String str = "hello";         System.out.println (c + num +str);         System.out.println(c + str + num);         System.out.println(c+ (num + str));         System.out.println((str + num +c));       } } ---------- java ---------- 107hello ahello10 a10hello hello10a   输出完成 (耗时 0 秒) - 正常终止