删除map：

 

@Test

public void removeElementFromMap()

{

Map<Integer, String> test = new HashMap<Integer, String>();

test.put(1, "a");

test.put(2, "b");

test.put(3, "c");

test.put(4, "d");

Iterator<Entry<Integer, String>> it = test.entrySet().iterator();

int key = 0;

while (it.hasNext())

{

key = it.next().getKey();

if (key == 1)

{

it.remove();

}

}

System.out.println(test);

}

 

删除List集合元素：

@Test

public void removeElementFromList()

{

List<Integer> testList = new ArrayList<Integer>();

testList.add(1111);

testList.add(2222);

testList.add(3333);

testList.add(4444);

Iterator<Integer> it = testList.iterator();

int value = 0;

while (it.hasNext())

{

value = it.next();

if (value == 1111)

{

it.remove();

}

}

}