Java鬥地主專案碎片

1.從52張撲克牌中隨機抽5張牌

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package javaapplication1;

/**
 *
 * @author Ankiia
 */
import java.util.*;
public class Main4 {
    public static void main(String[] args){
        Random r=new Random();
        int a[]=new int[53];
        int b[]=new int[5];
        int k=0;
        for(int i=0;i<5;i++){
            k=1+r.nextInt(52);
            if(a[k]==1){
                i--;
                continue;
            }
            else{
                b[i]=k;
                a[k]=1;
            }
        }
        for(int i=0;i<5;i++){
            if(b[i]/13==0){
                System.out.print("梅花");
            }else if(b[i]/13==1){
                System.out.print("方塊");
            }else if(b[i]/13==2){
                System.out.print("黑桃");
            }else if(b[i]/13>=3){
                System.out.print("紅心");
            }
            System.out.print(trans(b[i]%13)+"\t");
        }
    }
    public static char trans(int k){
        switch (k){
            case 1:
                return 'A';
            case 11:
                return 'J';
            case 12:
                return 'Q';
            case 0:
                return 'K';
            default:
                return (char)(k+48);
        }
    }
}