/**
 * Demo of variable scoping in Java.
 */
public class ScopeDemo {
    
    // instance var x: scope is the entire class
    private int x;
    
    public ScopeDemo(int val) {
        // param val: scope is this method/constructor
        x = val;
    }
    
    public int getX() {
        return x;
    }
    
    public int calcSomething() {
        // local val: scope is the enclosing block
        int val; // scope is this method block
        if (x > 0) {
            int temp = x + 3; // scope is this conditional block
            temp /= 2;
            val = x + temp;
        } else {
            val = x - 5;
        }
        
        return val * 2;
    }
    
    
    public static void main(String[] args) {
        ScopeDemo obj = new ScopeDemo(10);
        System.out.println(obj.calcSomething());
    }
    
}