第二次作业

Posted 2020-06-29

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


public class text {

	/**
	 * @param args
	 */
	public void run(){
		// TODO Auto-generated method stub
			//String a = "Hello World My First Unit Test";
			Scanner stdin = new Scanner(System.in); 
			System.out.println("请输入:");
			String a = stdin.nextLine();
			String[] b = a.split(" ");
			Map map = new HashMap<String,Integer>();       
			for(int c = 0;c<b.length;c++)
			{
				if(map.containsKey(b[c]))
				{
					int d = (Integer)map.get(b[c]);
					map.put(b[c],d+1);
				}
				else
				{
					map.put(b[c],1);
				}
			}
			for(Object obj : map.keySet()){

				Object value = map.get(obj );

				}


			for(Object obj : map.keySet())
			{
				System.out.println(obj.toString()+"出现了"+map.get(obj)+"次");

			}


	}

}

 

import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class text2 { /** * @param args */ public void run(){ // TODO Auto-generated mrethod stub //String a = "how are you"; Scanner stdin = new Scanner(System.in); System.out.println("请输入:"); String a = stdin.nextLine(); String[] b = a.split(" "); StringBuffer c = new StringBuffer(); for(int d=b.length-1;d>=0;d--) { c.append(b[d]+" "); } System.out.println(c); }

public class main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
			text a = new text();
			a.run();
			text2 b = new text2();
			b.run();
	}

}