Variable Scope in a block : Variable Scope « Language « Java Tutorial

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public class MainClass {
  public static void main(String[] args) {
    int outer = 1;

    {
      int inner = 2;
      System.out.println("inner = " + inner);
      System.out.println("outer = " + outer);
    }

    int inner = 3;
    System.out.println("inner = " + inner);
    System.out.println("outer = " + outer);
  }
}

inner = 2
outer = 1
inner = 3
outer = 1