Java中元组的使用

工作中看到了很多应用元组的场景,记录几个常用的元组工具类

• 二元组↓

public class Tuple2<K, V> {

	private K left;
	private V right;
	
	public Tuple2(K left, V right) {
		super();
		this.left = left;
		this.right = right;
	}

	public K getLeft() {
		return left;
	}

	public V getRight() {
		return right;
	}
}

• 三元组↓

public class Tuple3 <L, M, R> {

	private L left;
	private M middle;
	private R right;
	
	public Tuple3(L left, M middle, R right) {
		super();
		this.left = left;
		this.middle = middle;
		this.right = right;
	}

	public L getLeft() {
		return left;
	}

	public M getMiddle() {
		return middle;
	}

	public R getRight() {
		return right;
	}
}

• 四元组↓

public class Tuple4 <L, ML, MR, R> {

	private L left;
	private ML middleLeft;
	private MR middleRigth;
	private R right;
	
	public Tuple4(L left, ML middleLeft, MR middleRigth, R right) {
		super();
		this.left = left;
		this.middleLeft = middleLeft;
		this.middleRigth = middleRigth;
		this.right = right;
	}

	public L getLeft() {
		return left;
	}
	
	public ML getMiddleLeft() {
		return middleLeft;
	}
	
	public MR getMiddleRigth() {
		return middleRigth;
	}
	
	public R getRight() {
		return right;
	}
}

• 使用场景:当某个方法需要一次性返回多个标识状态的参数时可采用这些工具类

来源：CSDN

作者：花驴

链接：https://blog.csdn.net/qq_36499475/article/details/103837428