java assignment and null check

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1. What does null mean in Java

   

2. How to Check if an Object is Null in Java

   

3. How to Check Null in Java (with Pictures)

   

4. 자바에서 Null 확인하는 방법: 6 단계 (이미지 포함)

   

5. String Empty and Null Check Program in Java

   

6. How To Check If int is null in Java JavaProgramTo.com