Java 3D Desktop Environment旨在使用Java 3D来创建一个3D桌面环境。功能包括：分布式的应用程序

				package org.j3de.ui.constraint;
				                                                                        
				import org.j3de.ui.UIElement;                                                                        
				
				public class OneElementConstraintParam extends ConstraintParam {      
				  private UIElement element;
				  
				  public OneElementConstraintParam(UIElement element) {
				    this.element = element;
				  }
				  
				  public UIElement getElement() {
				    return element;
				  }                   
				}