两个乒乓球队进行比赛，找出三队赛手的名单

[java]代码库

import java.util.ArrayList;

/**
 * 两个乒乓球队进行比赛，各出三人。甲队为a,b,c三人，乙队为x,y,z三人。已抽签决定比赛名单。有人向队员打听比赛的名单。a说他不和x比，c说他不和x,
 * z比，请编程序找出三队赛手的名单。
 */
public class pingpang {
	String a, b, c;

	public static void main(String[] args) {
		String[] op = { "x", "y", "z" };
		ArrayList<pingpang> arrayList = new ArrayList<pingpang>();
		for (int i = 0; i < 3; i++)
			for (int j = 0; j < 3; j++)
				for (int k = 0; k < 3; k++) {
					pingpang a = new pingpang(op[i], op[j], op[k]);
					if (!a.a.equals(a.b) && !a.b.equals(a.c)
							&& !a.a.equals("x") && !a.c.equals("x")
							&& !a.c.equals("z")) {
						arrayList.add(a);
					}
				}
		for (Object a : arrayList) {
			System.out.println(a);
		}
	}

	public pingpang(String a, String b, String c) {
		super();
		this.a = a;
		this.b = b;
		this.c = c;
	}

	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "a的对手是" + a + "," + "b的对手是" + b + "," + "c的对手是" + c + "\n";
	}
}