package object_out; import java.util.HashMap; import java.util.concurrent.ConcurrentHashMap; public class TestRemoveFormWithValueTypeReturn { ConcurrentHashMap hm = new ConcurrentHashMap(); public void doRemove() { hm.remove("a_key"); } public void doRemove2() { hm.remove("a_key"); } public void doRemove3() { hm.remove("a_key"); } public void doRemove4() { hm.remove("a_key"); } }