com.fr.data.util

类 AbstractComparator

java.lang.Object

com.fr.data.util.AbstractComparator

所有已实现的接口:

FComparator, java.io.Serializable, java.util.Comparator

直接已知子类:

DefaultComparator

public abstract class AbstractComparator
extends java.lang.Object
implements FComparator

The abstract implementation of interface Comparator.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
AbstractComparator()

方法概要

方法

限定符和类型	方法和说明
int	compare(java.lang.Object obj1, java.lang.Object obj2) Compares its two arguments for order.
protected abstract int	innerCompare(java.lang.Object obj1, java.lang.Object obj2) Inner compare.
boolean	isNegate() Checks if the result is negated.
void	setNegate(boolean negate) If true, the result is negated.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 java.util.Comparator

equals

构造器详细资料

AbstractComparator

public AbstractComparator()

方法详细资料

setNegate

public void setNegate(boolean negate)

If true, the result is negated.

isNegate

public boolean isNegate()

Checks if the result is negated.

compare

public int compare(java.lang.Object obj1,
          java.lang.Object obj2)

Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

The implementor must ensure that sgn(compare(x, y)) == -sgn(compare(y, x)) for all x and y. (This implies that compare(x, y) must throw an exception if and only if compare(y, x) throws an exception.)

The implementor must also ensure that the relation is transitive: ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0.

Finally, the implementer must ensure that compare(x, y)==0 implies that sgn(compare(x, z))==sgn(compare(y, z)) for all z.

It is generally the case, but not strictly required that (compare(x, y)==0) == (x.equals(y)). Generally speaking, any comparator that violates this condition should clearly indicate this fact. The recommended language is "Note: this comparator imposes orderings that are inconsistent with equals."

指定者:

compare 在接口中 java.util.Comparator

参数:

obj1 - the first object to be compared.

obj2 - the second object to be compared.

返回:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

抛出:

java.lang.ClassCastException - if the arguments' types prevent them from being compared by this Comparator.

innerCompare

protected abstract int innerCompare(java.lang.Object obj1,
               java.lang.Object obj2)

Inner compare.