JAVA-用栈机制实现单词逆序排列

就是IO那一段还没学到。

之前的PUCH,POP,STRING和CHAR的关系搞得懂了。

学到一个定位STRING当中CHAR的转换函数。

 char = String.charAt(x)

import java.io.*;


class stackString
{
    private int maxSize;
    private char[] stackX;
    private int top;
    
    public stackString(int s)
    {
        maxSize = s;
        stackX = new char[maxSize];
        top = -1;
    }
    public void push(char j)
    {
        stackX[++top] = j;
    }
    public char pop()
    {
        return stackX[top--];
    }
    public char peek()
    {
        return stackX[top];
    }
    public boolean isEmpty()
    {
        return (top == -1);
    }
    public boolean isFull()
    {
        return (top == maxSize - 1);
    }
}
class Reverser
{
    private String input;
    private String output;
    
    public Reverser(String in)
    {
        input = in;
    }
    public String doRev()
    {
        int stackSize = input.length();
        stackString stackStringRev = new stackString(stackSize);
        
        for(int i = 0; i < stackSize; i++)
        {
            char charInString = input.charAt(i);
            stackStringRev.push(charInString);
        }
        output = "";
        while(!stackStringRev.isEmpty())
        {
            char ch = stackStringRev.pop();
            output = output + ch;
        }
        return output;
        
    }
    
}
public class StackApp {

    /**
     * @param args
     */
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        String input, output;
        
        while(true)
        {
            System.out.print("Enter a string: ");
            System.out.flush();
            input = getString();
            if(input.equals(""))
                break;
            
            Reverser testStringRev = new Reverser(input);
            output = testStringRev.doRev();
            System.out.println("Reversed : " + output);
            
            
        }

    }
    public static String getString() throws IOException
    {
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        String s = br.readLine();
        return s;
        
    }

}