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Pseudo terminal(PTY) implementation in Java

There is a newer version: 0.13.2

/*
 * Copyright 2000-2012 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.pty4j.util;

public final class Pair {
  public final A first;
  public final B second;

  public static  Pair create(A first, B second) {
    return new Pair(first, second);
  }

  public static  T getFirst(Pair pair) {
    return pair != null ? pair.first : null;
  }

  public static  T getSecond(Pair pair) {
    return pair != null ? pair.second : null;
  }

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

  public A getFirst() {
    return first;
  }

  public B getSecond() {
    return second;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    Pair pair = (Pair)o;

    return (first != null ? first.equals(pair.first) : pair.first == null) &&
           (second != null ? second.equals(pair.second) : pair.second == null);
  }

  public int hashCode() {
    int result = first != null ? first.hashCode() : 0;
    result = 31 * result + (second != null ? second.hashCode() : 0);
    return result;
  }

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