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
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
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
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
原文:https://www.cnblogs.com/rdchenxi/p/13197319.html