Mapping a String to an array of ints - Java

Question

How do I map a String to a statically defined array of ints? I tried

private static Map<String, int[]> map = new HashMap<String, int[]>();
static {
    map.put("foo", {5, 1, 3, 2});
    map.put("bar", {2, 7, 8});
}

which tells me that {5, 1, 3, 2} is illegal.

Jeremy · Accepted Answer · 2011-04-25 13:16:17Z

9

You need to call the array's constructor before you initialize the content.

map.put("foo", new int[]{5, 1, 3, 2});

edited Apr 25, 2011 at 13:16

answered Apr 24, 2011 at 23:59

Jeremy

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Bala R · Accepted Answer · 2011-04-25 00:01:05Z

5

Try

private static Map<String, int[]> map = new HashMap<String, int[]>();
static {
    map.put("foo", new int[]{5, 1, 3, 2});
    map.put("bar", new int[]{2, 7, 8});
}

answered Apr 25, 2011 at 0:01

Bala R

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Comments

Jeremy · Accepted Answer · 2011-04-25 13:18:12Z

0

If the map will never be changed, you could use Guava lib:

private static ImmutableMap<String, int[]> immutaleMap =
    ImmutableMap.of("foo", new int[]{5, 1, 3, 2},
                    "bar", new int[]{2, 7, 8});

edited Apr 25, 2011 at 13:18

Jeremy

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answered Apr 25, 2011 at 4:28

卢声远 Shengyuan Lu

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