Programming-Idioms

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[Java] Property name is p. +DocURL

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2016-12-11, 20:49:52

2016-12-11, 21:15:01

Idiom #28 Sort by a property

Sort elements of array-like collection items in ascending order of x.p, where p is a field of the type Item of the objects in items.

Sort elements of array-like collection items in ascending order of x.p, where p is a field of the type Item of the objects in items.

import java.util.Arrays;
import java.util.Comparator;

import java.util.Arrays;
import java.util.Comparator;

Arrays.sort(items, new Comparator<Item>(){
	public int compare(Item a, Item b){
		return a.birth - b.birth;
	}
});

Arrays.sort(items, new Comparator<Item>(){
	public int compare(Item a, Item b){
		return a.p - b.p;
	}
});

items is an array of type Item[].
Use an anonymous class which implements Comparator<Item>

items is an array of type Item[].
Use an anonymous class which implements Comparator<Item>

https://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html#sort(T[],%20java.util.Comparator)

http://ideone.com/gqNVEH

http://ideone.com/gqNVEH

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