GUI成績檢測程式碼

import java.awt.*;

public class IdentificationForm extends javax.swing.JFrame{
public IdentificationForm(){
    initComponents();

}
@SuppressWarnings("unchecked")
    private void initComponents(){
    jLabel1 = new javax.swing.JLabel();
    txtScore = new javax.swing.JTextField();
    CheckButton = new javax.swing.JButton();
    txtOutput = new javax.swing.JTextField();
    jLabel2 = new javax.swing.JLabel();
    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jLabel1.setText("你的分數");

    CheckButton.setText("檢查");
    CheckButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            CheckButtonActionPerformed(evt);
        }
    });

    jLabel2.setFont(new java.awt.Font("宋體", 0, 24)); // NOI18N
    jLabel2.setText("分數識別");

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addGroup(layout.createSequentialGroup()
                                                    .addGap(162, 162, 162)
                                                    .addComponent(txtOutput, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE))
                                            .addGroup(layout.createSequentialGroup()
                                                    .addGap(172, 172, 172)
                                                    .addComponent(CheckButton))
                                            .addGroup(layout.createSequentialGroup()
                                                    .addGap(168, 168, 168)
                                                    .addComponent(jLabel1)))
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 98, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addComponent(txtScore, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)))
                            .addContainerGap(154, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                            .addContainerGap(32, Short.MAX_VALUE)
                            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(29, 29, 29)
                            .addComponent(jLabel1)
                            .addGap(18, 18, 18)
                            .addComponent(txtScore, javax.swing.GroupLayout.PREFERRED_SIZE, 70, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                            .addComponent(CheckButton)
                            .addGap(18, 18, 18)
                            .addComponent(txtOutput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(27, 27, 27))
    );

    pack();
    }
    private void CheckButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_CheckButtonActionPerformed
        // TODO add your handling code here:
        txtOutput.setText("");
        txtOutput.setBackground(Color.WHITE);
        double score;
        String output="";
        score=Double.parseDouble(txtScore.getText());

        if (score>=60&&score<=100) {
            output="考試通過";
            txtOutput.setBackground(Color.green);
            txtOutput.setText(output);
        }else{
            output="考試不及格";
            txtOutput.setBackground(Color.red);
            txtOutput.setText(output);
        }
    }//GEN-LAST:event_CheckButtonActionPerformed

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {

        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(IdentificationForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(IdentificationForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(IdentificationForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(IdentificationForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }

        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new IdentificationForm().setVisible(true);
            }
        });
    }


    private javax.swing.JButton CheckButton;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JTextField txtOutput;
    private javax.swing.JTextField txtScore;


}