[Solved] Java cannot find symbol during compiling

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This has to do with the scope of your variable:

From Java Language Specification, Section 6.3:

The scope of a declaration is the region of the program within which the entity declared by the declaration can be referred to using a simple name, provided it is visible.

A declaration is said to be in scope at a particular point in a program if and only if the declaration’s scope includes that point.

So, analyzing your program…

  1. The String variable named pref is declared in scope #3. Hence it can be accessed by itself and other scopes nested within it.
  2. When you try to access the pref variable in scope #4 in lines 22 and 28.
  3. The same goes for the variable suff.

Now, How To Fix It?

Declare (and initialize) the variables outside the scopes where you need them. For example, you need the pref variable in scope #4. Therefore, declare it in the main() method, i.e. scope #2.

Then modify your if (p.equals ("Y")){... statement as:

if (s.equals ("Y")) {//offen4
    System.out.println("Gib deinen Suffix an!");
    suff = System.console().readLine();
} else {
    // some backup mechanism like System.exit(0);
    // so that it doesn't pose a problem later.

solved Java cannot find symbol during compiling