2017 10.

import java.util.Scanner;
 public class L {
 
      public static void main(String[] args) {
           long a ; 
           a=123456789012345l;
           System.out.println(a);
          
           float b=2.4f;
           System.out.println(b);
          
           boolean c=true;
           System.out.println(c);
           c=false;
           System.out.println(c);    
            
           byte d=3;
           d=(byte)(d+200);
           System.out.println(d);    
             
           System.out.println((char)(‘a‘+1));
           System.out.println((char)(‘你‘+1));
                 
           int e=Integer.MAX_VALUE+1;
           System.out.println(e);
                
           @SuppressWarnings("resource") 
           Scanner input=new Scanner(System.in);
           double f;
           System.out.println("Enter the x ");
           f = Double.valueOf(input.nextDouble());
           f=f/1000*1000;
           System.out.println("The calculation result is " + f);

           }
}

2017 10.

原文：http://www.cnblogs.com/777lixiaohui/p/7638726.html