Linked Questions

I need to check if some value is null or not. And if its not null then just set some variable to true. There is no else statement here. I got too many condition checks like this. Is there any way to ...

I find myself constantly writing this statement MyObject myObject = something.getThatObject(); if( myObject !=null && myObject .someBooleanFunction()){ } in order to prevent a null ...

Possible Duplicate: How to avoid “!= null” statements in Java? Share your thoughts..

I have some data in input that I'll have to use to set all properties of a POJO. The POJO might be partially set. My problem is to set the property only if related input data is not null. I know I can ...

I am writing codes that query the database to get the data. There are some classes that consist of Lists, but sometime the list or other attribute can not be initiated and their value is null, so I ...

What is the best way to avoid multiple if blocks which is used for null checks in Java? The following is my sample code. Which one is the most optimized way? if (address!=null} { if (firstName!=...

I am a junior developer and I use java to do website development. I know org.apache.common.lang.StringUtils is recommended because of its null safty. But what is null safe or null safty exacty? why ...

I know that NULL check for every arguments in a public API is good practice in java. But just curious, do we need do such NULL check in the front of all methods. There are definitely values for doing ...

How to avoid null insertion in ArrayList while inserting element? ArrayList<String> al=new ArrayList<String>(); al.add(null);//should avoid . . . al.add("Ramesh");

public class Test { //required fields private String str1; private String str2; //optional private Calendar cal; public Test(String a, String b){ str1 = a; ...

I am trying to build a geofencing app using Kotlin in the android studio but the VM crashed then the next run show this error E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.mapgis, PID: ...

I'd like to to make possible that layout with options to change the background color of MainActivity. I don't know how to do this- how tell the program to change the background color of other view, in ...

I'm getting some crash reports about a NullPointerException happening in StaggeredGridLayoutManager. Looks like around 10% of my users are suffering this issue. I have a very basic RecyclerView with ...

I have been trying lately but I just can't find where is the null object, help me understanding this error: 2021-01-24 01:10:47.244 24211-24211/com.salmanibrahim.firebasechat E/AndroidRuntime: FATAL ...

Can any Java proficient / expert suggest me what is the optimistic way of checking null reference or objects before using it to avoids NullPointerException? In my code I've more than 100 fields and ...