数据类型判断

[java]代码库

import java.util.*; 
public class Main{ 
    public static void main(String[] args) { 
         Scanner scan = new Scanner(System.in);
         String s = scan.nextLine();
         String []str = s.split(" ");
         int i, j;
         for(i = 0; i < str.length; i++) {
        	 if(i != 0)
        		 System.out.print(" ");
        	 if(str[i].equals("true") || str[i].equals("false")) {
        		 System.out.print("boolean");
        		 i++;
        		 System.out.print(" ");
        	 }
        	 int flag = 0;
        	 for(j = 0; j < str[i].length(); j++) {
        		 if(str[i].charAt(j) == '.')
        			 flag = 1;
        		 else if(str[i].charAt(j)>='A' && str[i].charAt(j)<='z')
        			 flag = 2;
        	 }
        	 if(flag == 1)
        		 System.out.print("double");
        	 else if(flag == 2)
        		 System.out.print("String");
        	 else
        		 System.out.print("int");
         }
         scan.close();  
    } 
}