sliderpanel.java

一个画1～6次方程的JAVA源程序

import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.ArrayList;
public class sliderPanel extends JPanel 
{
	private JSlider sa0,sa1,sa2,sa3,sa4,sa5,sa6;
	public ArrayList<Integer> L;
	private Container cc1,cc2;
	private final int max=20,min=-20,Major=10,Minor=1;
	private JLabel la0,la1,la2,la3,la4,la5,la6;
	private sixxPanel six;
	public sliderPanel(sixxPanel sixx) 
	{
		L=new ArrayList<Integer>();
		six=sixx;
		SliderListener listener=new SliderListener();

		cc1=new Container();
		cc2=new Container();
		cc1.setLayout(new GridLayout(7,1));
		cc2.setLayout(new GridLayout(7,1));

		sa0=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa0.setMajorTickSpacing(Major);
		sa0.setMinorTickSpacing(Minor);
		sa0.setPaintTicks(true);
		sa0.setPaintLabels(true);
		sa0.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa0.addChangeListener(listener);
		la0=new JLabel("0*x^6");
		la0.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa1=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa1.setMajorTickSpacing(Major);
		sa1.setMinorTickSpacing(Minor);
		sa1.setPaintTicks(true);
		sa1.setPaintLabels(true);
		sa1.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa1.addChangeListener(listener);
		la1=new JLabel("0*x^5");
		la1.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa2=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa2.setMajorTickSpacing(Major);
		sa2.setMinorTickSpacing(Minor);
		sa2.setPaintTicks(true);
		sa2.setPaintLabels(true);
		sa2.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa2.addChangeListener(listener);
		la2=new JLabel("0*x^4");
		la2.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa3=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa3.setMajorTickSpacing(Major);
		sa3.setMinorTickSpacing(Minor);
		sa3.setPaintTicks(true);
		sa3.setPaintLabels(true);
		sa3.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa3.addChangeListener(listener);
		la3=new JLabel("0*x^3");
		la3.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa4=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa4.setMajorTickSpacing(Major);
		sa4.setMinorTickSpacing(Minor);
		sa4.setPaintTicks(true);
		sa4.setPaintLabels(true);
		sa4.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa4.addChangeListener(listener);
		la4=new JLabel("0*x^2");
		la4.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa5=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa5.setMajorTickSpacing(Major);
		sa5.setMinorTickSpacing(Minor);
		sa5.setPaintTicks(true);
		sa5.setPaintLabels(true);
		sa5.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa5.addChangeListener(listener);
		la5=new JLabel("0*x");
		la5.setAlignmentX(Component.LEFT_ALIGNMENT);

		sa6=new JSlider (JSlider.HORIZONTAL,min,max,0);
		sa6.setMajorTickSpacing(Major);
		sa6.setMinorTickSpacing(Minor);
		sa6.setPaintTicks(true);
		sa6.setPaintLabels(true);
		sa6.setAlignmentX(Component.LEFT_ALIGNMENT);
		sa6.addChangeListener(listener);
		la6=new JLabel("0");
		la6.setAlignmentX(Component.LEFT_ALIGNMENT);
		
		cc1.add(la0);
		cc1.add(la1);
		cc1.add(la2);
		cc1.add(la3);
		cc1.add(la4);
		cc1.add(la5);
		cc1.add(la6);

		cc2.add(sa0);		
		cc2.add(sa1);		
		cc2.add(sa2);		
		cc2.add(sa3);		
		cc2.add(sa4);		
		cc2.add(sa5);		
		cc2.add(sa6);

		setLayout(new BorderLayout());
		add(cc1,BorderLayout.WEST);
		add(cc2,BorderLayout.CENTER);
	}
	public class SliderListener implements ChangeListener
	{
		public void stateChanged(ChangeEvent e)
		{
			L.clear();
			L.add(sa0.getValue());
			L.add(sa1.getValue());
			L.add(sa2.getValue());
			L.add(sa3.getValue());
			L.add(sa4.getValue());
			L.add(sa5.getValue());
			L.add(sa6.getValue());

			la0.setText(L.get(0)+"*x^6");
			la1.setText(L.get(1)+"*x^5");
			la2.setText(L.get(2)+"*x^4");
			la3.setText(L.get(3)+"*x^3");
			la4.setText(L.get(4)+"*x^2");
			la5.setText(L.get(5)+"*x");
			la6.setText(L.get(6)+" ");

			six.repaint();
		}
	}
}