Shadowing fun in Java The first references to x are this.x and afterwards the local variable. The code looks exactly the same but does something completely different.

Shadowing.java

class Shadowing {
  private float x;
  
  public Shadowing(float x) {
    this.x = x;
  }
  
  public void foo() {
    if(x < 0.5f) {
      x = Math.round(x);
      System.out.println("x is "+x);
    }
    
    // ...
    
    float x;
    
    /// ...
    
    x = Math.round(x);
    System.out.println("x is "+x);
  }