Prompt Title: Redeclaring Variables in Java.

In Java, you can redeclare a variable with the same name in the same block, but doing so will hide the previous variable with the same name. This means that the original variable will no longer be accessible in that block, and any attempts to access it will instead refer to the new variable. For example: ``` int x = 10; System.out.println(x); // prints 10 { int x = 20; System.out.println(x); // prints 20 } System.out.println(x); // prints 10 ``` In this code, we first declare a variable `x` with a value of 10. We then create a new block and declare another variable `x` with a value of 20. Inside this block, `x` refers to the new variable, so the call to `System.out.println(x)` will print 20. However, outside of the block, `x` refers to the original variable, so the final call to `System.out.println(x)` will print 10. It's generally considered bad practice to reuse variable names in this way, as it can lead to confusion and errors in your code. Instead, it's better to use unique variable names that clearly indicate their purpose.