无法删除多选对象

Question

我试图通过按SHIFT键选择多个对象，然后通过右键单击并选择删除选项，它应该能够删除所有选定的对象。

但是，它没有工作。

我的代码如下。

鼠标点击

clickShape = null; 
int x = clickEvent.getX(); // x-coordinate of point where mouse was 
             // clicked 
int y = clickEvent.getY(); // y-coordinate of point 
     // when press down shift key 
if (clickEvent.isShiftDown()) { 
    for (int i = 0; i < shapes.size(); i++) { 
     Shape s = (Shape) shapes.get(i); 
     if (s.containsPoint(x, y)) { 
      s.setColor(Color.RED); 
      multiShape.add(s); 

     } 

    } 

DeleteSelection

else if (command.equals("Delete Selection")) { 
     for (Shape s : multiShape)// look for multishape size 
      shapes.remove(multiShape); 
}// remove selectedmultiple object. 

Answer 1

应该

shapes.remove(s); 

不

shapes.remove(multiShape);

你应该通过shape s去除方法从形状ArrayList

java.util.ArrayList.remove(Object) // this is the method you are using .