Pair.java

package util;

public class Pair<A, B> {

	public A first;
	public B second;

	public static Pair<String, Double> of(String fs, String sep) {
		int sepidx = fs.indexOf(sep);
		String v1 = sepidx == -1 ? fs : fs.substring(0, sepidx);
		String v2 = sepidx == -1 ? "" : fs.substring(sepidx + 1);
		Pair<String, Double> p = new Pair<String, Double>(null, null);
		p.first = v1;
		p.second = Double.parseDouble(v2);
		return p;
	}

	public Pair(A first, B second) {
		super();
		this.first = first;
		this.second = second;
	}

	public String toString() {
		return "(" + first + ", " + second + ")";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((first == null) ? 0 : first.hashCode());
		result = prime * result + ((second == null) ? 0 : second.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Pair other = (Pair) obj;
		if (first == null) {
			if (other.first != null)
				return false;
		} else if (!first.equals(other.first))
			return false;
		if (second == null) {
			if (other.second != null)
				return false;
		} else if (!second.equals(other.second))
			return false;
		return true;
	}
}