22 lines
547 B
Java
22 lines
547 B
Java
Map<String, Integer> map = new HashMap<String, Integer>();
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map.put("hello", 1);
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map.put("world", 2);
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map.put("!", 3);
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// iterating over key-value pairs:
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for (Map.Entry<String, Integer> e : map.entrySet()) {
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String key = e.getKey();
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Integer value = e.getValue();
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System.out.println("key = " + key + ", value = " + value);
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}
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// iterating over keys:
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for (String key : map.keySet()) {
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System.out.println("key = " + key);
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}
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// iterating over values:
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for (Integer value : map.values()) {
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System.out.println("value = " + value);
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}
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