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Java集合通过带有迭代器的ArrayList遍历一个集合

欢马劈雪

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Java集合使用迭代器通过ArrayList遍历集合

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import java.util.Collection;

import java.util.ArrayList;
/**
来 自 时代Java公众号 - nowjava.com
**/

import java.util.Arrays;

import java.util.Iterator;

import java.text.DateFormatSymbols;

public class OysterMonths {

Collection<String> safeMonths;

public Collection<String> filter(Collection<String> c) {

Collection<String> filteredCollection = new ArrayList<String>();

for (Iterator<String> i = c.iterator(); i.hasNext();) {
        /**
        NowJava.com - 时代Java 提供 
        **/

String s = i.next();

if (condition(s)) {

filteredCollection.add(s);

}

return filteredCollection;

}

public boolean condition(String s) {

return s.contains("r");

}

public static void main(String[] args) {

OysterMonths om = new OysterMonths();

DateFormatSymbols dfs = new DateFormatSymbols();

String[] monthArray = dfs.getMonths();

Collection<String> months = Arrays.asList(monthArray);

om.safeMonths = om.filter(months);

System.out.println("The following months are safe for oysters:");

System.out.println(om.safeMonths);

}

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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