usewrapper.java

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public class UseWrapper
{
  public static void main(String args[])
  {
    int num=2001;
    System.out.println(num+"的二进制是:"+Integer.toBinaryString(num));
    System.out.println(num+"的八进制是:"+Integer.toOctalString(num));
    System.out.println(num+"的十六进制是:"+Integer.toHexString(num));
    Integer iobj = Integer.valueOf("123");
    Integer iobj1 = new Integer(123);
    Integer iobj2 = new Integer("234");
    int i = iobj.intValue();
    System.out.println("iobj="+iobj);
    System.out.println("i="+i);
    System.out.println("iobj1==iobj2"+iobj1.equals(iobj2));
  }
}