String字符串的构造方法

public String() 创建一个空字符串对象

String s = new String(); 
System.out.println("s: " + s);

 

       public String(String original) 创建一个内容为original的字符串对象

      

String s2 = new String("abc"); 
System.out.println("s2: " + s2);

 

       public String(char[] value)   将字符数组转换成字符串(必须记住)

      

char[] chs = {'a','b','c','d'}; 
String s3 = new String(chs); 
System.out.println("s3: " + s3);

 

       public String(char[] value, int index, int count) 将字符数组的一部分转换成字符串

     

 String s4 = new String(chs, 1, 2);
 System.out.println("s4: " + s4);

 

       public String(byte[] bytes) 将字节数组转换成字符串(必须记住)

     

  byte[] bys = {97,98,99,100}; 
  String s5 = new String(bys); 
  System.out.println("s5: " + s5);

 

       public String(byte[] bytes, int offset, int length) 将字节数组一部分转换为字符串

String s6 = new String(bys, 1, 2); 
System.out.println("s6: " + s6);