?? sco.java
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package sco;import java.awt.*;import java.awt.event.*;import java.applet.*;import javax.swing.*;import com.borland.jbcl.layout.*;public class sco extends Applet { int v; boolean isStandalone = false; JScrollBar s1 = new JScrollBar(); XYLayout xYLayout1 = new XYLayout(); /**Get a parameter value*/ public String getParameter(String key, String def) { return isStandalone ? System.getProperty(key, def) : (getParameter(key) != null ? getParameter(key) : def); } /**Construct the applet*/ public sco() { } /**Initialize the applet*/ public void init() { try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } /**Component initialization*/ private void jbInit() throws Exception { s1.setOrientation(JScrollBar.HORIZONTAL); s1.setValue(50); s1.setRequestFocusEnabled(true); s1.addAdjustmentListener(new java.awt.event.AdjustmentListener() { public void adjustmentValueChanged(AdjustmentEvent e) { s1_adjustmentValueChanged(e); } }); this.setLayout(xYLayout1); this.add(s1, new XYConstraints(60, 7, 200, -1)); } /**Get Applet information*/ public String getAppletInfo() { return "Applet Information"; } /**Get parameter info*/ public String[][] getParameterInfo() { return null; } void s1_adjustmentValueChanged(AdjustmentEvent e) { v=e.getValue(); s1.setValue(v); repaint(); } public void paint(Graphics g){ g.drawRect(150-v,150-v,2*v,2*v); } public void update(Graphics g){ g.clearRect(0,50,300,200); paint(g); } }?? 快捷鍵說明
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