DISPLAY VARIABLE TO LOG ANDROID STUDIO HOW TO

Now, sometimes, you will think that compiler is wrong because you know that variable is always going to be initialized but in reality, compilers are not as smart as you and you see this error as shown in the following program: The local variable count may not have been initialized In this case, the variable count will not be initialized before you use it on () statement if args.length is zero, hence compiler will throw 'variable might not have been initialized' when you run this program as shown below: One more scenario, where the compiler complains about 'variable might not have been initialized' is when you initialize the variable inside if() block since it is a condition block, compiler know that variable may not get initialized when if block is not executed, so it complains as shown in the following program: See these best Java Programming tutorials to learn more about how variables are initialized in Java. The local variable a may not have been initializedĪgain, the error message is very precise, it says that variable 'a' is not initialized on line 13 where you have used it for reading its value. Only variable b is initialized and variable 'a' is not initialized, hence when you run this program, you will get the 'variable might not have been initialized' error as shown below: Here you might think that both variables 'a' and 'b' are initialized to zero but that's not correct.

One of them is creating more than one local variable in the same line as shown in the following Java program: Now, there are some tricky scenarios where you think that you have initialized the variable but the compiler thinks otherwise and throws a 'variable might not have been initialized' error.

DISPLAY VARIABLE TO LOG ANDROID STUDIO HOW TO

How to fix 'variable might not have been initialized' error in Java? Example This program will both compile and run fine. sum // no error bcasue sum is instnace variable Int d = total // no error because total is static variable a static or non-static variable, you will not get this error as shown below: Though this rule is only for local variables, if you try to access uninitialized member variables e.g. The error message is very clear, it's saying that local variable 'b' has not initialized until line 14, where it has been read, which violates the Java rule of initializing the local variable before use. The local variable b may not have been initialized

You can see we are trying to access variable 'b' which is not initialized in statement c = a + b, hence when you run this program in Eclipse, you will get the following error:Įxception in thread 'main' java. You will not get this error if you just declare the local variable but will not use it. If the compiler believes that a local variable might not have been initialized before the next statement which is using it, you get this error. This is because Java has the rule to initialize the local variable before accessing or using them and this is checked at compile time.

You won't get this error if you use an uninitialized class or instance variable because they are initialized with their default value like Reference types are initialized with null and integer types are initialized with zero, but if you try to use an uninitialized local variable in Java, you will get this error. Cannot Find Symbol Variable Log - If it can't find what an identifier refers to (e.g., there is no declaration statement for a variable) it cannot complete the compilation.This error occurs when you are trying to use a local variable without initializing it.

Display variable to log android studio