printingslider.java

来自「Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套」· Java 代码 · 共 20 行

// Figure 8.43

import javax.swing.event.ChangeEvent;
public class PrintingSlider extends EventSlider {
	/** 	post:	this slider object is constructed
	 *				and  the orientation is horizontal
	 *				and  getMaximum() == max
	 *				and  getMinimum() == min
	 *				and  getValue() == val 
	 */ 
	public PrintingSlider(int min, int max, int val)  {
    	super(HORIZONTAL, min, max, val);
    }

	/**	post:	getValue() is output */
	public void stateChanged(ChangeEvent e)   {
        System.out.println( getValue() );
	}
}