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摘自Hasmaap的数值
原标题:extracting values from HashMap

我试图学习和理解哈希姆博的工作。 因此,我制作了该散列图,以储存某些价值,这些价值在使用一台散射机显示时,使我的产出成为我的产出。

 1=2
 2=3
 3=4

等等。 该产出一使用<代码>Iterator.next(功能。 现在,我的实际怀疑是,由于这种价值类型在变造者目标中回归,如果需要只提取上述等同的右侧价值,那么是否具有任何职能? 某些东西像一种扼杀。 是否有任何办法可以取得结果。

 2
 3
 4

任何帮助都将受到赞赏。 预先感谢。

最佳回答

我想用的是这样的东西。

Map<Integer, Integer> map = new HashMap<>();

for(int value: map.values())
   System.out.println(value);
问题回答

You are looking for map.values().

地图有一种称为价值的方法,以收集所有价值。 (右边)

同样,还有一种称为钥匙Set()的方法,以获得一套所有钥匙。 (左边)

import java.util.HashMap;

public class Test
{
    public static void main( String args[] )
    {
        HashMap < Integer , Integer > map = new HashMap < Integer , Integer >();

        map.put( 1 , 2 );
        map.put( 2 , 3 );
        map.put( 3 , 4 );

        for ( Integer key : map.keySet() )
        {
            System.out.println( map.get( key ) );
        }
    }
}

您需要Map# Values(,回归

然后,你可以正常的方式从这一收集中获得<代码>Iterator。





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