在 Java 中呼叫另一個方法中的變數

public class CallAVariable {
  static int y = 4; // declared inside class scope.
  public static void main(String[] args) {
    String val = "Hello"; // declared inside the scope of main method hence available in main only.

    System.out.println("In Main where static variable y is: " + y);
    callInNormal(val);
  }
  public static void callInNormal(String val) {
    System.out.println("Value of static variable y in a static method is : " + y
        + " and String passed is: " + val);
  }
}

In Main where static variable y is: 4
Value of static variable y in a static method is : 4 and String passed is: Hello

public class CallAVariable {
  int x = 2;
  static int y = 6;

  public static void main(String[] args) {
    // since the method is non static it needs to be called on the instance of class.
    // and so does the variable x.
    CallAVariable i = new CallAVariable();
    System.out.println("In Main where static variable y is: " + y + " and x is: " + i.x);
    i.callInNormal(i.x);
  }
  public void callInNormal(int x) {
    CallAVariable i = new CallAVariable();
    System.out.println("Non static variable x is : " + x + " and static variable y is: " + y);
  }
}

In Main where static variable y is: 6 and x is: 2
Non static variable x is : 2 and static variable y is: 6