jtextarea

问题 How can I add text to a JTextArea instead of replacing all of it? I know about setText(String) but other than that I'm a bit lost. 回答1: You can use the append method like this: textArea.append(additionalText); 回答2: To insert string at any position you can use the component's Document. public static void main(String[] args) throws BadLocationException { JTextField f = new JTextField("foo bar"); int offset = 7; String str = " baz"; f.getDocument().insertString(offset, str, SimpleAttributeSet

问题 How can I add text to a JTextArea instead of replacing all of it? I know about setText(String) but other than that I'm a bit lost. 回答1: You can use the append method like this: textArea.append(additionalText); 回答2: To insert string at any position you can use the component's Document. public static void main(String[] args) throws BadLocationException { JTextField f = new JTextField("foo bar"); int offset = 7; String str = " baz"; f.getDocument().insertString(offset, str, SimpleAttributeSet

问题 While making a program, I noticed a bug with the JOptionPane.showMessageDialog() call. I use a button to create a JTextArea that wraps and then display a dialog containing this text area. If the text area is too large, however, the dialog does not size itself correctly to the height of the JTextArea. The Dialog cuts off the OK button in this example. I replicated the bug in the following code: import java.awt.*; import java.awt.event.*; import javax.swing.*; public class DialogBug { public

问题 I am looking for a way to disable the ability to highlight in the JTextArea. Currently this is my JTextArea: textArea1 = new JTextArea(); textArea1.setBorder(BorderFactory.createLineBorder(Color.black, 1)); DefaultCaret caret = (DefaultCaret) textArea1.getCaret(); // this line and the line below was inspired by a comment found here: https://stackoverflow.com/questions/15623287/how-to-always-scroll-to-bottom-of-text-area caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE); textArea1.setEditable

问题 JTextArea area1 = new JTextArea(); JTextArea area2 = new JTextArea(); DocumentListener documentListener = new DocumentListener() { public void changedUpdate(DocumentEvent documentEvent) { printIt(documentEvent); } public void insertUpdate(DocumentEvent documentEvent) { printIt(documentEvent); } public void removeUpdate(DocumentEvent documentEvent) { printIt(documentEvent); } private void printIt(DocumentEvent documentEvent) { DocumentEvent.EventType type = documentEvent.getType(); String

问题 I need to show suggestions (autocomplete) as the user types in a JTextArea , kind of like cell phone T9. I don't know how to do this in myTextAreaKeyTyped() event. This app is a typing helper. It shows variants of characters non-present on the keyboard. E.G. You press 'A', it shows Â:1, Á:2 ,À:3… 'A' will be replaced if you press 1,2 or 3. It's already done, but the variants are shown in a JLabel at the bottom of my JFrame , because I don't know how to do this. Can you please help me out?

问题 I need to show suggestions (autocomplete) as the user types in a JTextArea , kind of like cell phone T9. I don't know how to do this in myTextAreaKeyTyped() event. This app is a typing helper. It shows variants of characters non-present on the keyboard. E.G. You press 'A', it shows Â:1, Á:2 ,À:3… 'A' will be replaced if you press 1,2 or 3. It's already done, but the variants are shown in a JLabel at the bottom of my JFrame , because I don't know how to do this. Can you please help me out?

问题 I need to show suggestions (autocomplete) as the user types in a JTextArea , kind of like cell phone T9. I don't know how to do this in myTextAreaKeyTyped() event. This app is a typing helper. It shows variants of characters non-present on the keyboard. E.G. You press 'A', it shows Â:1, Á:2 ,À:3… 'A' will be replaced if you press 1,2 or 3. It's already done, but the variants are shown in a JLabel at the bottom of my JFrame , because I don't know how to do this. Can you please help me out?

问题 I have next problem, JScrollPane don't appear on JTextArea and I don't know why? I tried in many ways but nothing, it don't want to show me! I put below a part of the code. All appears correctly, JFame, JTextArea, text inside JTextArea, all without JScrollPane. Please, can somebody help me? package pachet; import java.awt.BorderLayout; import java.awt.Container; import java.util.ArrayList; import javax.swing.GroupLayout; import static javax.swing.GroupLayout.Alignment.BASELINE; import javax

问题 I have next problem, JScrollPane don't appear on JTextArea and I don't know why? I tried in many ways but nothing, it don't want to show me! I put below a part of the code. All appears correctly, JFame, JTextArea, text inside JTextArea, all without JScrollPane. Please, can somebody help me? package pachet; import java.awt.BorderLayout; import java.awt.Container; import java.util.ArrayList; import javax.swing.GroupLayout; import static javax.swing.GroupLayout.Alignment.BASELINE; import javax