028-Java-019

Java String类

创建

public class StringDemo{
   public static void main(String args[]){
      char[] helloArray = { 'r', 'u', 'n', 'o', 'o', 'b'};
      String helloString = new String(helloArray);  
      System.out.println( helloString );
   }
}

长度

public class StringDemo {
    public static void main(String args[]) {
        String site = "www.runoob.com";
        int len = site.length();
        System.out.println( "菜鸟教程网址长度 : " + len );
   }
}

连接

string1.concat(string2);

"我的名字是 ".concat("Tom");

更常用的是使用'+'操作符来连接字符串，如：

"Hello," + " Tom" + "!"

public class StringDemo {
    public static void main(String args[]) {     
        String string1 = "我是：";     
        System.out.println("1、" + string1 + "Tom！");  
    }
}