public class Shape { 
  protected double x_ = 0.0; 
  protected double y_ = 0.0; 
  protected double width_ = 0.0; 
  protected double height_ = 0.0; 
  synchronized double x() { return x_; } 
  synchronized double y() { return y_; } 
  synchronized double width(){ return width_; } 
  synchronized double height(){ return height_; } 
  synchronized void adjustLocation() { 
    x_ = longCalculation1(); 
    y_ = longCalculation2(); } 
  synchronized void adjustDimensions() { 
    width_ = longCalculation3(); 
    height_ = longCalculation4(); } 
}