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public static void main(String[] args) {
Map<String, String> map = new HashMap<String, String>();
map.put("1", "value1");
map.put("2", "value2");
map.put("3", "value3");
//第ä¸ç§ï¼æ®é使ç¨ï¼äºæ¬¡åå¼
System.out.println("éè¿Map.keySetéåkeyåvalueï¼");
for (String key : map.keySet()) {
System.out.println("key= "+ key + " and value= " + map.get(key));
}
//第äºç§
System.out.println("éè¿Map.entrySet使ç¨iteratoréåkeyåvalueï¼");
Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry<String, String> entry = it.next();
System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
}
//第ä¸ç§ï¼æ¨èï¼å°¤å
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System.out.println("éè¿Map.entrySetéåkeyåvalue");
for (Map.Entry<String, String> entry : map.entrySet()) {
System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
}
//第åç§
System.out.println("éè¿Map.values()éåææçvalueï¼ä½ä¸è½éåkey");
for (String v : map.values()) {
System.out.println("value= " + v);
}
}
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