JAVA 2应用开发指南

				//Test1.Java
				public class Test1
				{
				        public static void main(String args[])
				   {
				          int i=100;
				          long l=5252524;
				          double d=123.456;
				          float f=3.1415f;
				          Integer obj1=new Integer(i);
				          Float obj2=new Float(f);
				          Long obj3=new Long(l);
				          Double obj4=new Double(d);
				          String s1=obj1.toString();
				          String s2=obj2.toString();
				          String s3=obj3.toString();
				          String s4=obj4.toString();
				          System.out.println("s1 ="+s1);
				          System.out.println("s2 ="+s2);
				          System.out.println("s3 ="+s3);
				          System.out.println("s4 ="+s4);
				   }
				}