cannot resolve symbol

Question

这种 问题 一半也就是classpath之类的原因了吧我想

Answer 1

是不是呢，我一直在D:\j2sdk1.4.1_02\bin>路徑下編譯得很好。

Answer 2

包含RadioButtonListener的类没有import进来

Answer 3

import java.awt.*; import javax.swing.*;
import java.awt.event.*;
class DrawGUI extends JFrame {
JButton btnCalculate = new JButton("Calculate Grade");
JButton btnReset = new JButton("Reset");JRadioButton radEnglish = new JRadioButton("English student",true);
JRadioButton radMath = new JRadioButton("Math student",false);
JRadioButton radScience = new JRadioButton("Science student",false);JLabel lblMidterm = new JLabel("Midterm",JLabel.CENTER);
JLabel lblFinalExam = new JLabel("Final Exam",JLabel.CENTER);
JLabel lblResearch = new JLabel("Research Paper",JLabel.CENTER);
JLabel lblPresentation = new JLabel("Presentation",JLabel.CENTER);
JLabel lblTypes = new JLabel("Student Types",JLabel.CENTER);
JLabel lblGrades = new JLabel("Grades",JLabel.CENTER);
JLabel lblStudentType = new JLabel("ENGLISH STUDENT",JLabel.CENTER);
JLabel lblFinalGrade = new JLabel(" ",JLabel.CENTER);JTextField txtMidterm = new JTextField();
JTextField txtFinalExam = new JTextField();
JTextField txtResearch = new JTextField();
JTextField txtPresentation = new JTextField();ButtonGroup radioGroup = new ButtonGroup();RadioButtonListener rbListener = new RadioButtonListener(this);
CalculateButtonListener cbListener = new CalculateButtonListener(this);
ResetButtonListener resetListener = new ResetButtonListener(this);
FrameListener fListener = new FrameListener();DrawGUI() {
Container c = getContentPane();
c.setLayout(null);c.add(txtMidterm); c.add(txtFinalExam); c.add(txtResearch);
c.add(txtPresentation);c.add(lblTypes); c.add(lblMidterm); c.add(lblFinalExam);
c.add(lblResearch); c.add(lblPresentation); c.add(lblStudentType);
c.add(lblGrades); c.add(lblFinalGrade);c.add(btnCalculate); c.add(btnReset);c.add(radEnglish); c.add(radMath); c.add(radScience);radEnglish.addActionListener(rbListener);
radMath.addActionListener(rbListener);
radScience.addActionListener(rbListener);btnCalculate.addActionListener(cbListener);
btnReset.addActionListener(resetListener);
this.addActionListener(fListener);radEnglish.setBounds(1,50,150,40);
radMath.setBounds(1,100,150,40);
radScience.setBounds(1,150,150,40);lblTypes.setBounds(0,0,200,40);
lblMidterm.setBounds(150,50,100,40);
lblFinalExam.setBounds(150,100,100,40);
lblResearch.setBounds(150,150,100,40);
lblPresentation.setBounds(150,200,100,40);
lblGrades.setBounds(150,0,100,40);
lblStudentType.setBounds(250,0,200,40);
lblFinalGrade.setBounds(225,250,250,40);txtMidterm.setBounds(300,50,50,40);
txtFinalExam.setBounds(300,100,50,40);
txtResearch.setBounds(300,150,50,40);
txtPresentation.setBounds(300,200,50,40);btnCalculate.setBounds(50,250,160,40);
btnReset.setBounds(50,300,160,40);setSize(500,450);
setTitle("Grade Caculator");
setVisible(true);
setResizable(false);  }   }
編譯錯誤：
symbol  : class RadioButtonListener  CalculateButtonListener  ResetButtonListener
                         FrameListener 

Answer 4

含RadioButtonListener的类没有import进来
这个类在那里啊？

Answer 5

主要是我沒編譯radiobuttonlistener那四個類，給分：hui_hui_lin:10,dentance:10,也感謝其他二位。