現在、Spring Utilities クラスが必要な小さなアプリケーションを作成しています。このクラスはコンテンツ ペインであるため「JPanel」を拡張しますが、コンテナを介してレイアウトのタイプを取得する必要がありますが、このクラス/フレームのみが使用されていますEventQueue Exception を返すスプリング レイアウト (クラス = https://docs.oracle.com/javase/tutorial/uiswing/examples/layout/SpringGridProject/src/layout/SpringUtilities.java ) エラー:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: No such child: 0
at java.awt.Container.getComponent(Unknown Source)
at dinges.Utilities.SpringUtilities.getConstraintsForCell(SpringUtilities.java:153)
at dinges.Utilities.SpringUtilities.makeCompactGrid(SpringUtilities.java:190)
at dinges.Containers.Addnew.<init>(Addnew.java:38)
at dinges.Containers.Listeners.AddListener.mousePressed(AddListener.java:27)
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
これによるものだと思います
SpringUtilities.makeCompactGrid(this, 3, 2, 6, 6, 6, 6);
「this」は使用できないため、何を使用すればよいかわかりません。
コード:
package dinges.Containers;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
import dinges.Utilities.SpringUtilities;
@SuppressWarnings("serial")
public class Addnew extends JPanel {
/**
* > Add a text input for the following:
* > Id, Name, last name, current balance, and the state. But this has to be in order of the new Account.
* > we're just going to be using JTextFields, a JButton for saving and JLabels for writing what it is
*
**/
public Addnew() {
// frame size is WIDTH = 280 , HEIGHT = 480
SpringLayout layout = new SpringLayout();
setLayout(layout);
JButton save = new JButton("Save data");
JTextField name = new JTextField(15);
JTextField lastname = new JTextField(15);
JComboBox<String> accounttype = new JComboBox<String>();
JLabel label1 = new JLabel("First name: ", JLabel.TRAILING);
JLabel label2 = new JLabel("Last name: ", JLabel.TRAILING);
JLabel label3 = new JLabel("Account type: ", JLabel.TRAILING);
label1.setLabelFor(name);
label2.setLabelFor(lastname);
label3.setLabelFor(accounttype);
SpringUtilities.makeCompactGrid(this, 3, 2, 6, 6, 6, 6);
add(label1);
add(label2);
add(label3);
add(save);
add(name);
add(lastname);
add(accounttype);
}
}
どんな助けでも素晴らしいでしょう、そして前もって感謝します。