Question

我正在尝试从Jframe表单的用户输入创建多个对象。我在这里看到很多关于如何使用控制台执行此操作的帖子，所有答案最终都放在循环中;但是没有人问如何从Jframe表格中做到这一点。

    private void CreateAccount() {
    String selected = UserSelectList.getSelectedValue();
    String setName = nameTboxSet.getText();
    String setType = UserTypeBoxSet.toString();            

    if ("user1" == selected) {user1.setName(setName); user1.setUserType(setType);}
    else if ("user2" == selected) {user2.setName(setName); user2.setUserType(setType);}
    else if ("user3" == selected) {user3.setName(setName); user3.setUserType(setType);}
    else if ("user4" == selected) {user4.setName(setName); user4.setUserType(setType);}
    else if ("user5" == selected) {user5.setName(setName); user5.setUserType(setType);}
    else if ("user6" == selected) {user6.setName(setName); user6.setUserType(setType);}
    else if ("user7" == selected) {user7.setName(setName); user7.setUserType(setType);}
    else if ("user8" == selected) {user8.setName(setName); user8.setUserType(setType);}
    else if ("user9" == selected) {user9.setName(setName); user9.setUserType(setType);}
    else if ("user10" == selected) {user10.setName(setName); user10.setUserType(setType);}
}

以上是我目前提出的内容，但老实说，我不认为列表是必要的，我已经尝试了许多方法来尝试找出如何使这项工作。

Answer 1

在您的代码中，您错误地确定了哪个项目已被选中。假设您使用了java.awt.List组件，这就是您尝试实现的目标。

if (listName.getSelectedItem.equals(“user1”)){ ... }

有关此内容的更多信息，请访问List组件的Oracle文档：https://docs.oracle.com/javase/7/docs/api/java/awt/List.html

我编写了一个快速示例，向您展示它的实际效果：

import java.awt.BorderLayout;
    import java.awt.EventQueue;
    import java.awt.List;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.border.EmptyBorder;

    public class TestFrame extends JFrame {

        private JPanel contentPane;

        public static void main(String[] args) {
            EventQueue.invokeLater(new Runnable() {
                public void run() {
                    try {
                        TestFrame frame = new TestFrame();
                        frame.setVisible(true);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }

        public TestFrame() {
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            setBounds(100, 100, 450, 300);
            contentPane = new JPanel();
            contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
            contentPane.setLayout(new BorderLayout(0, 0));

            List list = new List();
            list.add("user1", 0);
            list.add("user2", 1);
            list.add("user3", 2);
            list.add("user4", 3);
            list.add("user5", 4);
            list.addActionListener(new ActionListener(){
                @Override
                public void actionPerformed(ActionEvent e) {
                    if(list.getSelectedItem().equals("user1")){
                        System.out.println("User 1 has been selected!");
                    }else if(list.getSelectedItem().equals("user2")){
                        System.out.println("User 2 has been selected!");
                    }
                }           
            });

            contentPane.add(list);      
            setContentPane(contentPane);
        }

    }

从用户输入创建多个对象

1 个答案: