我有两个HashMaps
。
HashMap<String, String> hMap=new HashMap<String, String>();
hMap.put("1","one");
hMap.put("2", "two");
hMap.put("3", "three");
hMap.put("4", "four");
HashMap<String, String> hMap2=new HashMap<String, String>();
hMap2.put("one", "");
hMap2.put("two", "");
我想将 hMap2 的键与不相等的 hMap 进行比较,我需要将它放在另一个 hashMap 中。为此,我尝试了类似的方法。
HashMap<String, String> hMap3=new HashMap<String, String>();
Set<String> set1=hMap.keySet();
Set<String> set2=hMap2.keySet();
Iterator<String> iter1=set1.iterator();
Iterator<String> iter2=set2.iterator();
String val="";
while(iter1.hasNext()) {
val=iter1.next();
System.out.println("key and value in hmap is "+val+" "+hMap.get(val));
iter2=set2.iterator();
while(iter2.hasNext()) {
String val2=iter2.next();
System.out.println("val2 value is "+val2);
if(!hMap.get(val).equals(val2)) {
hMap3.put(val, hMap.get(val));
System.out.println("value adding");
}
}
}
System.out.println("hashmap3 is "+hMap3);
我在这里得到的输出是
hashmap3 is {3=three, 2=two, 1=one, 4=four}
我的预期输出是
hashmap3 is {3=three, 4=four}
请纠正我的逻辑。在此先感谢