score.java

一个贪吃蛇游戏

/**
 * @(#)Score.java
 * @A high score ranking of normal mode and survival mode.
 *
 * @Link Scholes
 * @version 1.00 2008/7/21
 */

package Data;

//Java core packages
import java.io.*;
import java.util.*;
import java.util.zip.*;

public class Score implements DataInterface
{
	private int temp;
	private int tempRanking;
	private int normalScores[];
	private int survivalScores[];
	private int survivalStages[];
	private String score;
	private String normalMaps[];
	private String normalPlayers[];
	private String survivalPlayers[];
	private String scores[];
	private BufferedReader input;
	private BufferedWriter output;
	private File file;
	private Scanner scanner;
	
	//construct a ranking based on the file "score.dat"
	public Score()
	{
		normalScores = new int[10];
		survivalScores = new int[10];
		survivalStages = new int[10];
		normalMaps = new String[10];
		normalPlayers = new String[10];
		survivalPlayers = new String[10];
		file = new File("score.dat");
		
		try
		{
			if (file.exists())
			{
				read();
			}
			else
			{
				create();
			}
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
	
	//get the rankings of specified kind(normal/survival)
	public String[] getRankings(boolean b)
	{
		scores = new String[10];
		
		if (b)
		{
			for (int i = 0;i < 10;i ++)
			{
				score = "";
				
				if (i < 9)
				{
					score += " ";
				}
				
				score += (i + 1) + "    " + normalPlayers[i] + "    ";
				
				for (int j = 9;j > normalMaps[i].length();j --)
				{
					score += " ";
				}
				
				score += normalMaps[i] + "    ";
				
				for (int j = 9;j > Integer.toString(normalScores[i]).length();j --)
				{
					score += " ";
				}
				
				score += normalScores[i];
				scores[i] = score;
			}
		}
		else
		{
			for (int i = 0;i < 10;i ++)
			{
				score = "";
				
				if (i < 9)
				{
					score += " ";
				}
				
				score += (i + 1) + "    " + survivalPlayers[i] + "    STAGE";
				
				for (int j = 4;j > Integer.toString(survivalStages[i]).length();j --)
				{
					score += " ";
				}
				
				score += survivalStages[i] + "    ";
				
				for (int j = 9;j > Integer.toString(survivalScores[i]).length();j --)
				{
					score += " ";
				}
				
				score += survivalScores[i];
				scores[i] = score;
			}
		}
		
		return scores;
	}
	
	//get the temporary ranking of the specified score in the specified kind(normal/survival)
	public int getTempRanking(boolean b,int n)
	{
		tempRanking = -1;
		
		for (int i = 0;i < 10;i ++)
		{
			if (n > ((b)?normalScores[i]:survivalScores[i]))
			{
				tempRanking = i;
				i = 10;
			}
		}
		
		return tempRanking;
	}
	
	//update the ranking with specified kind(normal/survival),player name,map name/stage and score
	public void update(boolean b,String s,String t,int n)
	{
		if (b)
		{
			for (int i = 9;i > tempRanking;i --)
			{
				normalPlayers[i] = normalPlayers[i - 1];
				normalMaps[i] = normalMaps[i - 1];
				normalScores[i] = normalScores[i - 1];
			}
			
			normalPlayers[tempRanking] = s;
			normalMaps[tempRanking] = t;
			normalScores[tempRanking] = n;
		}
		else
		{
			for (int i = 9;i > tempRanking;i --)
			{
				survivalPlayers[i] = survivalPlayers[i - 1];
				survivalStages[i] = survivalStages[i - 1];
				survivalScores[i] = survivalScores[i - 1];
			}
			
			survivalPlayers[tempRanking] = s;
			survivalStages[tempRanking] = Integer.parseInt(t);
			survivalScores[tempRanking] = n;
		}
		
		try
		{
			write();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
	
	//reset the ranking with defaulted value
	public void reset()
	{
		for (int i = 0;i < 10;i ++)
		{
			normalScores[i] = 1000 - i * 100;
			survivalScores[i] = 10000 - i * 1000;
			survivalStages[i] = 10 - i;
			normalMaps[i] = "DEFAULT";
			normalPlayers[i] = "MBP";
			survivalPlayers[i] = "MBP";
		}
		
		try
		{
			write();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
	
	//turn the ranking to String
	public String toString()
	{
		score = normalPlayers[0] + " " + normalMaps[0] + " " + normalScores[0];
		
		for (int i = 1;i < 10;i ++)
		{
			score += " " + normalPlayers[i] + " " + normalMaps[i] + " " + normalScores[i];
		}
		
		for (int i = 0;i < 10;i ++)
		{
			score += " " + survivalPlayers[i] + " " + survivalStages[i] + " " + survivalScores[i];
		}
		
		return score;
	}
	
	//create the file "score.dat" if not existed
	public void create() throws IOException
	{
		output = new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(new GZIPOutputStream(new FileOutputStream("score.dat")))));
		output.close();
		reset();
	}
	
	//read the contents of the file "score.dat"
	public void read() throws IOException
	{
		score = "";
		input = new BufferedReader(new InputStreamReader(new BufferedInputStream(new GZIPInputStream(new FileInputStream("score.dat")))));
		temp = input.read();
		
		while (temp != -1)
		{
			score += (char)temp;
			temp = input.read();
		}
		
		input.close();
		scanner = new Scanner(score);
		
		for (int i = 0;i < 10;i ++)
		{
			normalPlayers[i] = scanner.next();
			normalMaps[i] = scanner.next();
			normalScores[i] = scanner.nextInt();
		}
		
		for (int i = 0;i < 10;i ++)
		{
			survivalPlayers[i] = scanner.next();
			survivalStages[i] = scanner.nextInt();
			survivalScores[i] = scanner.nextInt();
		}
	}
	
	//write the contents of the ranking to the file "score.dat"
	public void write() throws IOException
	{
		input = new BufferedReader(new StringReader(toString()));
		output = new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(new GZIPOutputStream(new FileOutputStream("score.dat")))));
		temp = input.read();
		
		while (temp != -1)
		{
			output.write(temp);
			temp = input.read();
		}
		
		input.close();
		output.close();
	}
}	//end class Score