63 lines
2.1 KiB
Java
63 lines
2.1 KiB
Java
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// A little program that demonstrates JSliders. This is an alternative
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// version of SliderDemo.java that uses lambda expressions to define
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// the ChangeListeners are registered with the sliders.
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import java.awt.*;
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import javax.swing.*;
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public class SliderDemoWithLambda extends JPanel {
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/**
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* A main routine allows this class to be run as an application.
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*/
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public static void main(String[] args) {
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JFrame window = new JFrame("Slider Demo");
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SliderDemoWithLambda content = new SliderDemoWithLambda();
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window.setContentPane(content);
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window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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window.setLocation(120,70);
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window.setSize(350,200);
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window.setVisible(true);
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}
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//---------------------------------------------------------------------
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JSlider slider1, slider2, slider3; // The sliders.
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JLabel label; // A label for reporting changes in the sliders' values.
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public SliderDemoWithLambda() {
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setLayout(new GridLayout(4,1));
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setBorder(BorderFactory.createCompoundBorder(
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BorderFactory.createLineBorder(Color.DARK_GRAY, 2),
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BorderFactory.createEmptyBorder(8,8,8,8)));
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label = new JLabel("Try dragging the sliders!", JLabel.CENTER);
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add(label);
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slider1 = new JSlider(0,10,0);
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slider1.addChangeListener(
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evt -> label.setText("Slider one changed to " + slider1.getValue()) );
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add(slider1);
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slider2 = new JSlider();
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slider2.addChangeListener(
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evt -> label.setText("Slider two changed to " + slider2.getValue()) );
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slider2.setMajorTickSpacing(25);
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slider2.setMinorTickSpacing(5);
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slider2.setPaintTicks(true);
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add(slider2);
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slider3 = new JSlider(2000,2100,2014);
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slider3.addChangeListener(
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evt -> label.setText("Slider three changed to " + slider3.getValue()) );
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slider3.setLabelTable(slider3.createStandardLabels(50));
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slider3.setPaintLabels(true);
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add(slider3);
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} // end constructor
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}
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