Java中mouseListener和mouseMotionListener的区别？

当鼠标移动到组件上时，mouseMotionListener是否会触发事件，而MouseStener仅在我按下按钮时才会触发

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所以如果我只有一个mousePressed事件，那么我就不需要mouseMotionListener了？只有当我有鼠标插入或退出时才可以？

是的，你是对的

mouseMotionListener

用于在鼠标移动到“热点”上时执行操作

我们可以找到很好的例子

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处理

mousePressed

事件时，您只需要

mousePressed

事件，除非您想在鼠标悬停时添加更多要执行的事件。

它们侦听不同的事件：

根据您所关注的事件添加侦听器

mouseClicked(MouseEvent event)   // Called just after the user clicks the listened-to component.
mouseEntered(MouseEvent event)   // Called just after the cursor enters the bounds of the listened-to component.
mouseExited(MouseEvent event)    // Called just after the cursor exits the bounds of the listened-to component.
mousePressed(MouseEvent event)   // Called just after the user presses a mouse button while the cursor is over the listened-to component.
mouseReleased(MouseEvent event)  // Called just after the user releases a mouse button after a mouse press over the listened-to component

mouseDragged(MouseEvent event)   // Called in response to the user moving the mouse while holding a mouse button down. This event is fired by the component that fired the most recent mouse-pressed event, even if the cursor is no longer over that component.
mouseMoved(MouseEvent event)     // Called in response to the user moving the mouse with no mouse buttons pressed. This event is fired by the component that's currently under the cursor.