Java.lang.Boolean.toString() 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;



      // assign values to b1, b2

      b1 = new Boolean(true);

      b2 = new Boolean(null);



      // create 2 Strings s1, s2

      String s1, s2;



      // assign string value of objects b1, b2 to s1, s2

      s1 = b1.toString();

      s2 = b2.toString();



      String str1 = "String value of boolean object " + b1 + " is "  + s1;

      String str2 = "String value of boolean object " + b2 + " is "  + s2;



      // print s1, s2 values

      System.out.println( str1 );

      System.out.println( str2 );

   }

}