[Java] 浅谈java String不可变的好处

public final class string
   implements java.io.serializable, comparable<string>, charsequence {
  /** the value is used for character storage. */
  private final char value[];
 }

public final class string
  implements java.io.serializable, comparable<string>, charsequence {
  /** the value is used for character storage. */
  private final byte[] value;
 
  /** the identifier of the encoding used to encode the bytes in   
  {@code value}. */
  private final byte coder;
}

public class test{
  public static void main(string [] args){
   string a="abc";
   string b="abc";//对象保存在string pool中
   string c=new string("abc");//以new创建的对象保存在堆中
   system.out.println("a==b:"+(a==b));
   system.out.println("a==c:"+(a==c));
     
 } 
}