java - 不同的等级

错误行在下面的代码中指出。我注意到的是，如果我突出显示“客户”一词并按住ctrl-T，则会弹出显示“客户-SwimCalc”正确的层次结构。但是如果我对Contractor做同样的事情，它会说Contractor-SwimCalc.Customer

public class SwimCalc extends JFrame implements ActionListener {
    private JTabbedPane jtabbedPane;
    private JPanel Customers;
    private JPanel Contractors;
    private List<Customer> customers = new ArrayList<Customer>();

    // this fails
    private List<Contractor> contractors = new ArrayList<Contractor>();

    JTextArea NameTextCustomers, ExistTextCustomers, MessageTextCustomers,
    NameTextContractors, ExistTextContractors, MessageTextContractors;
    JTextField lengthTextPool, widthTextPool, depthTextPool, volumeTextPool;

    public SwimCalc() {
        setTitle("Volume Calculator");
        setSize (300, 200);

        JPanel topPanel = new JPanel();
        topPanel.setLayout( new BorderLayout() );
        getContentPane().add( topPanel );

        createCustomers();
        createContractors();

        jtabbedPane = new JTabbedPane();
        jtabbedPane.addTab("Customer", Customers);
        topPanel.add(jtabbedPane, BorderLayout.CENTER);
    }
}

最佳答案

错误“承包商无法解析为类型”可能意味着


您从未在代码中的任何地方编写class Contractor {...}
由于某些构建路径问题，Eclipse无法编译整个项目（请查看“问题”视图以查看构建路径错误）
您忘记导入类型Contractor

关于java - 不同的等级，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/5474859/