String类中六种构造方法使用方法和作用

String s = new String("abc");
  System.out.println(s); //abc

    String s1 = "中国";
  System.out.println(s1); //中国

       char [] c = new char[] {'a','b','c'};
       String ss = new String(c);
       System.out.println(ss); // a b c

       char [] c = new char[] {'a','d','d'};
       String ss = new String(c,0,1);
       System.out.println(ss); // a 

       byte [] b = new byte[] {48,49,99};
       String sss = new String(b);
       System.out.println(sss); // 0 1 c

       byte [] b2 = new byte[] {48,49,50,66};
       String sss1 = new String(b2,0,2);
       System.out.println(sss1); // 0 1