How to Resolve Types Mismatch Error: Cannot Convert Int to Byte in Java?

How can I fix the type mismatch error that says 'cannot convert int to byte' in my Java code?

byte b = 130; // Error: Type mismatch: cannot convert int to byte

The 'Type mismatch: cannot convert int to byte' error commonly occurs in Java when you attempt to assign a value of type int to a variable of type byte without proper casting. Since a byte can only hold values from -128 to 127, attempting to assign an integer that exceeds this range will result in a compile-time error.

int intValue = 130;
byte b = (byte) intValue; // This will work but results in data loss as b will be -126

Causes

• Assigning an integer literal that exceeds the byte range (-128 to 127).
• Failure to cast the int value to byte explicitly when needed.

Solutions

• Use explicit casting to convert the int value to byte, like `byte b = (byte) intValue;`.
• Ensure that the value assigned to the byte variable is within the byte range.
• Consider using a larger data type (e.g., short or int) if the expected values exceed the byte limit.

Mistake: Forgetting to cast or convert the int to byte before assignment.

Solution: Always explicitly cast integer values when assigning them to a byte variable.

Mistake: Assuming Java will automatically convert int to byte without checking value range.

Solution: Understand Java's type conversion rules and the range limits of data types.