equals, Null Pointer Exception 없이 사용하기

public class equalsTest {
	public static void main(String[] args) {
		 String allowed = null;
	        if(allowed.equals("allowed")){
	            System.out.println("일치");   
	        }else {
	            System.out.println("불일치");
	        }
	}
}

결과 : Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because "allowed" is null at snippet.equalsTest.main(equalsTest.java:6)

 

public class equalsTest {
	public static void main(String[] args) {
		 String allowed = null;
	        if("allowed".equals(allowed)){
	            System.out.println("일치");   
	        }else {
	            System.out.println("불일치");
	        }
	}
}

결과 : 불일치