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Test case generation strategies

There is a newer version: 0.2.0

package com.github.jesg.dither;

/*
 * #%L
 * dither
 * %%
 * Copyright (C) 2015 Jason Gowan
 * %%
 * 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.
 * #L%
 */

class Pair {
    final int i;
    final int j;

    Pair(final int i, final int j) {
        this.i = i;
        this.j = j;
    }


    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + i;
        result = prime * result + j;
        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 (j != other.j)
            return false;
        if (i != other.i)
            return false;
        return true;
    }

    public String toString() {
        return "Pair i: " + i + " j: " + j;
    }
}