java - 从参数中将字符串内容分配给 Java 中的新字符串

Question

有这个方法

void doSomething(String input)
{
   //trick for create new object instead of reference assignment
   String workStr= "" + input; 

   //work with workStr
}

Java 的实现方式是什么？

编辑

• 如果我使用输入变量作为 input=something，那么 Netbeans 会发出关于赋值的警告方法参数
• 如果我使用 new String(input) 创建它，它会警告使用 String 构造函数

也许解决方案不是不为输入分配任何内容，或者只是忽略警告..

Answer 1

String copy = new String(original);

Initializes a newly created String object so that it represents the same sequence of characters as the argument; in other words, the newly created string is a copy of the argument string. Unless an explicit copy of original is needed, use of this constructor is unnecessary since Strings are immutable.

http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#String(java.lang.String )