reverserapp.java

java 数据结构的一些简单实例和一些线程的应用主要是面向初学者

import java.io.*;
class StackX{
	char[] a;
	int size;
	int top;
	
	public StackX(int max){
		size=max;
		a=new char[max];
		top=-1;
	}
	public void push(char value){
		a[++top]=value;
	}
	public char pop(){
		return a[top--];
	}
	public char peek(){
		return a[top];
	}
	public boolean isempty(){
		return (top==-1);
	}
	public boolean isfull(){
		return (top==size-1);
	}
}

class Reverser{
	String output;
	String input;
	StackX s;
	public Reverser(String in){
	input=in;
	}
	public String doreverse(){
		int length=input.length();
		s=new StackX(length);
		
		for(int i=0;i<length;i++){
			char c=input.charAt(i);
			s.push(c);
		}
		String output=" ";
		 
		while(!s.isempty())
		{
			char c;
			c=s.pop();
			output=c+output;
			
		}
		return output;
	}
	
	
}

public class ReverserApp {
public static void main(String[] args)throws IOException
{
	
	String output,input;
	while(true)
	{
		System.out.println("please enter the input");
		input=getString();
		
		if(input.equals(""))
			break;
		Reverser r=new Reverser(input);
	    output=r.doreverse();
		System.out.println("the result is"+" "+output);
	}
		
	}
	
public static String getString()throws IOException{
	InputStreamReader isr=new InputStreamReader(System.in);
	BufferedReader br=new BufferedReader(isr);
	String s=br.readLine();
	return s;
}
public static int getInt()throws IOException{
	String s=getString();
	return Integer.parseInt(s);
}
	
	
}