s1(java)项目实战（固定资产管理）（set_ kindschoice ）

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package set;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
* Title: 
*
* Description: 
*
* Copyright: Copyright (c) 2007
*
* Company: 
*
* @author not attributable
* @version 1.0
*/
public class kindschoice extends JDialog {
 private JComboBox jcb_kindsChoice;
 private JButton btn_ok = new JButton();
 private String kindstr;
 public kindschoice(Frame owner, String title, boolean modal) {
 super(owner, title, modal);
 try {
 setDefaultCloseOperation(DISPOSE_ON_CLOSE);
 jbInit();
 pack();
 } catch (Exception exception) {
 exception.printStackTrace();
 }
 }

    public kindschoice() {
        this(new Frame(), "kindschoice", false);
    }

    private void jbInit() throws Exception {
        this.getContentPane().setLayout(null);
        String[] kindsType = {"一级科目", "二级科目"};
        jcb_kindsChoice = new JComboBox(kindsType);
        jcb_kindsChoice.setBounds(new Rectangle(39, 26, 161, 39));
        this.getContentPane().add(jcb_kindsChoice);
        this.getContentPane().add(btn_ok);
        btn_ok.setBounds(new Rectangle(75, 100, 68, 35));
        btn_ok.setText("确定");
        btn_ok.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btnok();
            }

});
}

    private void btnok() {
        if (jcb_kindsChoice.getSelectedItem().toString().trim().length() == 0) {
            JOptionPane.showMessageDialog(this, "没有选择科目");
        } else {

            kindstr = jcb_kindsChoice.getSelectedItem().toString().trim();
            this.setVisible(false);
        }
    }

    public String getkindstr() {
        return kindstr;
    }

    public void closedialog() {
        this.dispose();
    }
}