Find the error in the program segments. Explain how to correct the error.

```
void f(float a); {
float a;
System.out.println(a);
}
```

Error: The semicolon after the right parenthesis of the parameter list is incorrect, and the parameter a should not be redeclared in the method.
Correction: Delete the semicolon after the right parenthesis of the parameter list, and delete the declaration float a;.