e796. 设置JSlider的方向

Besides being either horizontal or vertical, a slider can also be inverted. An inverted horizontal slider moves from right-to-left. An inverted vertical slider moves from top-to-bottom.

    // Create a horizontal slider that moves left-to-right
    JSlider slider = new JSlider();
    
    // Make the horizontal slider move right-to-left
    slider.setInverted(true);
    
    // Make it vertical and move bottom-to-top
    slider.setOrientation(JSlider.VERTICAL);
    slider.setInverted(false);
    
    // Make it vertical and move top-to-bottom
    slider.setOrientation(JSlider.VERTICAL);
    slider.setInverted(true);

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