Java.lang.Boolean.valueOf() 方法

package com.codingdict;



import java.lang.*;



public class BooleanDemo {



   public static void main(String[] args) {



      // create 2 Boolean objects b1, b2

      Boolean b1, b2;



      // create 2 String's and assign values

      String s1 = null;

      String s2 = "false";



      /**

       *  static method is called using class name 

       *  assign result of valueOf method on s1, s2 to b1, b2

       */

      b1 = Boolean.valueOf(s1);

      b2 = Boolean.valueOf(s2);



      String str1 = "Boolean instance of string " + s1 + " is "  + b1;

      String str2 = "Boolean instance of string " + s2 + " is "  + b2;



      // print b1, b2 values

      System.out.println( str1 );

      System.out.println( str2 );

   }

}