Map<br>遍歴する4つの方法
1304 ワード
Map<String, String> map = new HashMap<String, String>();
map.put("key1", "value1");
map.put("key2", "value2");
map.put("key3", "value3");
// : ,
System.out.println(" Map.keySet key value:");
for (String key : map.keySet()) {
System.out.println("key= "+ key + " and value= " + map.get(key));
}
//
System.out.println(" Map.entrySet iterator key value:");
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());
}
<span style="color:#FF0000;"> // : , </span>
System.out.println(" Map.entrySet key value");
for (Map.Entry<String, String> entry : map.entrySet()) {
System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
}
//
System.out.println(" Map.values() value, key");
for (String v : map.values()) {
System.out.println("value= " + v);
}