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How can I check if an int I declared has been initialized with a variable? number == null will not work because ints are primitive types.
This question is not relevant because the user asks how to check if the int is null, to which the answerer responds to use Integer. However, I want to check if the primitive data type int is initialized.
This question is also irrelevant because that is for a reference type whereas I'm asking for a primitive type. Already clarified -.- and still getting marked...
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For a field variable you can check by comparing the int to 0 that is the default value for an int field : private int x: // default 0 for an int ... public void foo(){ if (x == 0){ // valid check // ... } } It's not always necessary to assign a value when a field is declared.
There is no way to check if a variable has been initialized in C++. Initialization should be ensured by a programmer. Modern compilers warn on potential attempts to access an uninitialized variable.
No difference - int members are initialized to zero by default.
Solution. If a variable is declared but not initialized or uninitialized and if those variables are trying to print, then, it will return 0 or some garbage value.
Instance fields are initialized to null, 0, etc. Local fields are not initialized. There is no way to test for this, short of attempting to use the field and generating an exception. A good practice is to always initialize local variables when you declare them.
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