菜鸟Java

 1 public class test1{
 2     public static void main(String[] args){
 3         int num = 10;
 4         System.out.println(num);
 5         System.out.println(Integer.MAX_VALUE);
 6         System.out.println(Integer.MIN_VALUE);
 7         
 8 
 9     }
10 }

 1 public class test1{
 2     public static void main(String[] args){
 3         int a = 10;
 4         int b = 20;
 5         int c = a;
 6             a = b;
 7             b = c;
 8         
 9         System.out.println(a);
10         System.out.println(b);
11     }
12 }