數組中取值不重複問題解決方法

定義數組池及使用標誌位，以下以雙色球爲例：

1.定義數組池

定義紅球池

String[] m_RedPool = { "01", "02", "03", "04", "05", "06", "07", "08",
				"09", "10", "11", "12", "13", "14", "15", "16", "17", "18",
				"19", "20", "21", "22", "23", "24", "25", "26", "27", "28",
				"29", "30", "31", "32", "33" };

定義紅球使用標誌位

boolean[] m_RedUsedFlag=new boolean[m_RedPool.length];

2.代碼

package DoubleBall;

import java.util.Arrays;
import java.util.Random;

public class DoubleBall {

	/**
	 * @param args
	 */
	static String[]  m_RedPool= { "01", "02", "03", "04", "05", "06", "07", "08",
			"09", "10", "11", "12", "13", "14", "15", "16", "17", "18",
			"19", "20", "21", "22", "23", "24", "25", "26", "27", "28",
			"29", "30", "31", "32", "33" };
	static String[] m_BluePool = new String[16];
	static boolean[] m_RedUsedFlag=new boolean[m_RedPool.length];
	static boolean[] m_BlueUsedFlag= new boolean[m_BluePool.length];
	static String[] m_Ball = new String[7];
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		BluePool();
		Ball();
	}
	private static void BluePool() {
		for(int i=0;i<m_BluePool.length;i++){
			char[] tmpBase={'0','0'};
			String tmpBallIn=Integer.toString(i+1);
			char[]tmpBall=tmpBallIn.toCharArray();
//			System.out.println(Arrays.toString(tmpBall));
			System.arraycopy(tmpBall, 0, tmpBase, tmpBase.length-tmpBall.length, tmpBall.length);
//			System.out.println(Arrays.toString(tmpBase));
			m_BluePool[i]=new String(tmpBase);
		}
		System.out.println(Arrays.toString(m_BluePool));
	}
	private static void Ball() {
		Random tmpRandonBall=new Random();
		int tmpBallNum;
		for(int i=0;i<6;i++){
			do {
				tmpBallNum=tmpRandonBall.nextInt(33);
			} while (m_RedUsedFlag[tmpBallNum]);
			m_RedUsedFlag[tmpBallNum]=true;
			m_Ball[i]=m_RedPool[tmpBallNum];
		}
		m_Ball[m_Ball.length-1]="99";
		Arrays.sort(m_Ball);
//		System.out.println(Arrays.toString(m_Ball));
		m_Ball[m_Ball.length-1]=m_BluePool[tmpRandonBall.nextInt(16)];
		System.out.println(Arrays.toString(m_Ball));
	}
}