cn.hutool.core.comparator.ComparableComparator Maven / Gradle / Ivy
package cn.hutool.core.comparator;
import java.io.Serializable;
import java.util.Comparator;
/**
* 针对 {@link Comparable}对象的默认比较器
*
* @param 比较对象类型
* @author Looly
* @since 3.0.7
*/
public class ComparableComparator> implements Comparator, Serializable {
private static final long serialVersionUID = 3020871676147289162L;
/** 单例 */
@SuppressWarnings("rawtypes")
public static final ComparableComparator INSTANCE = new ComparableComparator<>();
/**
* 构造
*/
public ComparableComparator() {
super();
}
/**
* 比较两个{@link Comparable}对象
*
*
* obj1.compareTo(obj2)
*
*
* @param obj1 被比较的第一个对象
* @param obj2 the second object to compare
* @return obj1小返回负数，大返回正数，否则返回0
* @throws NullPointerException obj1为{@code null}或者比较中抛出空指针异常
*/
@Override
public int compare(final E obj1, final E obj2) {
return obj1.compareTo(obj2);
}
@Override
public int hashCode() {
return "ComparableComparator".hashCode();
}
@Override
public boolean equals(final Object object) {
return this == object || null != object && object.getClass().equals(this.getClass());
}
}