wrapperclassdemo.java

来自「JAVA的一些基础教程」· Java 代码 · 共 23 行

public class WrapperClassDemo {                                       
                                                                      
  public static void main(String[] args) {                            
                                                                      
    Byte a = new Byte("1");                                           
    Short b = new Short("2");                                         
    Integer c = new Integer(100);                                     
    Long d = new Long(2000);                                          
    Boolean e = new Boolean(true);                                    
     Float f = new Float(3.14f);                                      
     Double g = new Double(3.1415);                                   
                                                                      
     c = new Integer(500);                                            
     System.out.println("变量c的整数值为:"+ c.intValue());            
     int h = Integer.parseInt("2000");                                
     c = Integer.valueOf("5000");                                     
                                                                      
     System.out.println("h 的十六进制值为:"+ Integer.toHexString(h)); 
     System.out.println("h 的八进制值为:"+ Integer.toOctalString(h)); 
     System.out.println("h 的二进制值为:"+ Integer.toBinaryString(h));
                                                                      
   }                                                                  
 }