Question

我有这个脚本应该为SQLite数据库添加一个整数。

//SIMPLIFIED SCRIPT FOR DEMONSTRATING PURPOSES
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    AddBuilding(Integer.parseInt(jTextField1.getText());   //Convert input String to int and add it to the database.
}

public void AddBuilding(int code) {
String sql = "INSERT INTO Buildings (Code) VALUES (?)"; 

        try (Connection conn = this.connect();
            PreparedStatement pstmt = conn.prepareStatement(sql)) {
            pstmt.setInt(1, code);
            pstmt.executeUpdate();
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }
}

当我尝试将文本字段字符串转换为整数并将其传递给数据库时，我收到以下错误。当我尝试传递一个实际的整数时，它没有问题。例如（AddBuilding（1）;）

ERROR：

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "jTextField1"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at diaxirisikoinoxriston.Add_Building.jButton1ActionPerformed(Add_Building.java:169)
at diaxirisikoinoxriston.Add_Building.access$100(Add_Building.java:7)
at diaxirisikoinoxriston.Add_Building$2.actionPerformed(Add_Building.java:76)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Answer 1

似乎你的Textfield.getText（）方法将“jTextField1”作为字符串。请验证文本字段的输入是否仅为整数，或者找出为什么getText（）方法返回文本字段名称。

无法将转换后的整数传递给数据库

1 个答案: