Java.lang.Boolean.getBoolean() 方法

package com.codingdict;



import java.lang.*;



public class BooleanDemo {



   public static void main(String[] args) {



      // create 2 boolean primitives bool1, bool2

      boolean bool1, bool2;



      /**

       *  using System class's setProprty method, set the values of

       *  system properties demo1, demo2.

       */

      System.setProperty("demo1","true");

      System.setProperty("demo2","abcd");



      // retrieve value of system properties to s1, s2

      String s1 = System.getProperty("demo1");

      String s2 = System.getProperty("demo2");



      // assign result of getBoolean on demo1, demo2 to bool1, bool2

      bool1 = Boolean.getBoolean("demo1");

      bool2 = Boolean.getBoolean("demo2");



      String str1 = "boolean value of system property demo1 is " + bool1;

      String str2 = "System property value of demo1 is " + s1;

      String str3 = "boolean value of system property demo2 is " + bool2;

      String str4 = "System property value of demo2 is " + s2;



      // print bool1, bool2 and s1, s2 values

      System.out.println( str1 );

      System.out.println( str2 );

      System.out.println( str3 );

      System.out.println( str4 );

   }

}