frame_interpolator.java

拉格朗日的线形函数

package interpolator;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import com.borland.jbcl.layout.*;


public class Frame_Interpolator extends JFrame {
  JPanel contentPane;
  Border border1;
  XYLayout xYLayout1 = new XYLayout();
  JButton jButton1 = new JButton();
  JTextArea show_result = new JTextArea();
  Border border2;
  Border border3;
  JLabel jLabel2 = new JLabel();
  JTextField strXinput = new JTextField();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel3 = new JLabel();
  JTextField strYinput = new JTextField();
  JTextField strTinput = new JTextField();

  //Construct the frame
  public Frame_Interpolator() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    border1 = BorderFactory.createLineBorder(Color.white,1);
    border2 = new EtchedBorder(EtchedBorder.RAISED,new Color(255, 255, 244),new Color(142, 161, 119));
    border3 = BorderFactory.createBevelBorder(BevelBorder.RAISED,Color.white,Color.white,new Color(102, 109, 105),new Color(147, 156, 151));
    contentPane.setLayout(xYLayout1);
    this.setSize(new Dimension(446, 292));
    this.setTitle("Java插值器");
    contentPane.setBackground(new Color(212, 208, 255));
    contentPane.setEnabled(false);
    contentPane.setMinimumSize(new Dimension(438, 261));
    contentPane.setPreferredSize(new Dimension(500, 300));
    jButton1.setBackground(new Color(210, 249, 184));
    jButton1.setAlignmentY((float) 0.5);
    jButton1.setBorder(border3);
    jButton1.setText("插  值  计  算");
    jButton1.addActionListener(new Frame_Interpolator_jButton1_actionAdapter(this));
    show_result.setBackground(new Color(203, 230, 255));
    show_result.setBorder(border2);
    show_result.setCaretPosition(0);
    show_result.setText("show_result");
    jLabel2.setAlignmentX((float) 0.3);
    jLabel2.setAlignmentY((float) 0.3);
    jLabel2.setMaximumSize(new Dimension(50, 16));
    jLabel2.setMinimumSize(new Dimension(50, 16));
    jLabel2.setPreferredSize(new Dimension(50, 16));
    jLabel2.setHorizontalAlignment(SwingConstants.TRAILING);
    jLabel2.setText("给定节点的X值：");
    jLabel2.setVerticalAlignment(SwingConstants.CENTER);
    strXinput.setBorder(BorderFactory.createLineBorder(Color.black));
    strXinput.setPreferredSize(new Dimension(200, 25));
    strXinput.setCaretPosition(0);
    strXinput.setText("0.10,0.15,0.25,0.40,0.50,0.57,0.70,0.85,0.93,1.00");
    strXinput.setHorizontalAlignment(SwingConstants.LEADING);
    jLabel1.setAlignmentX((float) 0.3);
    jLabel1.setAlignmentY((float) 0.3);
    jLabel1.setMaximumSize(new Dimension(50, 16));
    jLabel1.setMinimumSize(new Dimension(50, 16));
    jLabel1.setOpaque(false);
    jLabel1.setPreferredSize(new Dimension(50, 16));
    jLabel1.setHorizontalAlignment(SwingConstants.TRAILING);
    jLabel1.setText("给定节点的Y值：");
    jLabel3.setText("插值点的X值：");
    jLabel3.setHorizontalAlignment(SwingConstants.TRAILING);
    jLabel3.setPreferredSize(new Dimension(50, 16));
    jLabel3.setOpaque(false);
    jLabel3.setMinimumSize(new Dimension(50, 16));
    jLabel3.setMaximumSize(new Dimension(50, 16));
    jLabel3.setAlignmentY((float) 0.3);
    jLabel3.setAlignmentX((float) 0.3);
    strYinput.setBorder(BorderFactory.createLineBorder(Color.black));
    strYinput.setPreferredSize(new Dimension(200, 25));
    strYinput.setCaretPosition(0);
    strYinput.setText("0.904837,0.860708,0.778801,0.670320,0.606531,0.565525,0.496585,0.427415,0.394554,0.367879");
    strTinput.setText("0.63");
    strTinput.setPreferredSize(new Dimension(200, 25));
    strTinput.setCaretPosition(0);
    strTinput.setBorder(BorderFactory.createLineBorder(Color.black));
    contentPane.add(jButton1,     new XYConstraints(66, 103, 213, 23));
    contentPane.add(show_result, new XYConstraints(25, 142, 388, 132));
    contentPane.add(jLabel2, new XYConstraints(1, 3, 92, 24));
    contentPane.add(strXinput, new XYConstraints(99, 0, 318, 24));
    contentPane.add(jLabel1, new XYConstraints(1, 27, 95, 24));
    contentPane.add(jLabel3, new XYConstraints(0, 51, 95, 24));
    contentPane.add(strYinput, new XYConstraints(96, 25, 319, 24));
    contentPane.add(strTinput, new XYConstraints(98, 52, 319, 24));
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    CInterpolator cinter =new CInterpolator();
    String result="";
    if(cinter.GetNodesFromString(strXinput.getText(),strYinput.getText(),strTinput.getText(),","))
    {
      result= cinter.res2str();
    }else{
      result = "在获得节点时存在错误";
    }
    show_result.setText(result);
  }
}

class Frame_Interpolator_jButton1_actionAdapter implements java.awt.event.ActionListener {
  Frame_Interpolator adaptee;

  Frame_Interpolator_jButton1_actionAdapter(Frame_Interpolator adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}