[2018-09-03] ArrayList에 add 한 값이 기대한 값이 아님

public class SomeBean { private String something; public String getSomething() { return something; } public void setSomething(String something) { this.something = something; } }

public class SomethingTest { @Test public void test() { ArrayList<SomeBean> someList = new ArrayList<SomeBean>(); SomeBean someBean = new SomeBean(); someBean.setSomething("something"); someList.add(someBean); someBean.setSomething("something2"); someList.add(someBean); for(int i=0, n=someList.size(); i<n; i++){ System.out.println("someList.get(" + i + ").getSomething() : " + someList.get(i).getSomething(); } } }

기대 결과

someList.get(0).getSomething() : something

someList.get(1).getSomething() : something2

실제 결과

someList.get(0).getSomething() : something2

someList.get(1).getSomething() : something2

수정 소스

public class SomethingTest { @Test public void test() { ArrayList<SomeBean> someList = new ArrayList<SomeBean>(); SomeBean someBean = new someBean(); someBean.setSomething("something"); someList.add(someBean); SomeBean someBean2 = new SomeBean(); someBean2.setSomething("something2"); someList.add(someBean2); for(int i=0, n=someList.size(); i<n; i++){ System.out.println("someList.get(" + i + ").getSomething() : " + someList.get(i).getSomething(); } } }

기대 결과

someList.get(0).getSomething() : something

someList.get(1).getSomething() : something2

실제 결과

someList.get(0).getSomething() : something

someList.get(1).getSomething() : something2