Map map = new HashMap(); map.put("first","football"); map.put("first","basketball"); 会输出什么

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Map map = new HashMap(); map.put("first","football"); map.put("first","basketball"); 会输出什么
Map map = new HashMap(); map.put("first","football"); map.put("first","basketball"); 会输出什么

Map map = new HashMap(); map.put("first","football"); map.put("first","basketball"); 会输出什么
basketball
后面的 会把前面的 football 覆盖.