jtextfield

问题 I have an uneditable and disabled JtextField in which I will put a String obtained after requesting a Database, and I want that this JtextField wraps All my String. I saw the setColumn() and setSize() methods but I don't know first my String length. thank you very much. 回答1: JTextFields can only display a single line of text, period. If you need a simple text component that wraps text, use a JTextArea. Set its columns and rows. Put it into a JScrollPane (if you feel the text will go beyond

问题 I want to make a window application for PC using java swing. I would like to make a text field there. While typing to that text field I need it to show tips under that text field. And user can select the needed text from the list. The same like the google searching does in the browser. So I need some two functions, first one is easy: filter a set of strings by already typed text. But how to show them in a list ? EDIT1: I need the list to be shown if there is something to show after filtration

问题 I want to simulate entering a string (can contain any character) in JTextField. I am using new KeyEventData() for that. But I am not able to determine how to handle characters like {, }, ) etc and also how to append a new character to already entered characters. 回答1: You can use Robot for this, as shown in this example. To get { , for example, you'll need to do something like this: keyPress(KeyEvent.VK_SHIFT); keyPress(KeyEvent.VK_OPEN_BRACKET); keyRelease(KeyEvent.VK_OPEN_BRACKET);

问题 How do I get the JTextField to have a fixed height when the Frame is maximized? I want it to look sort of similar to the Skype application on Ubuntu. private JTextField username; private JPasswordField password; private JLabel usernamelabel; private JLabel passwordlabel; public LoginPanel(){ setSize(200,200); setLayout(new GridLayout(4,4)); setBackground(new Color(85,153,187)); setBorder(BorderFactory.createEmptyBorder(70, 70, 70, 70)); username = new JTextField(); password = new

问题 I have a long String that I want to display in a JTextField . If the String is too long, it is showing the right-portion of the String , rather than the left portion, even when I use setHorizontalAlignment(JTextField.LEFT) For example, if my String is "JTextField example , this text is too long" , it should show as... |----------------------| | JTextField example ..| |----------------------| but instead it shows as... |----------------------| | this text is too long| |----------------------|

问题 K, so unlike with my last question, I've been proactive about trying to deal with this problem a number of times, and it's still not working. Basically I'm trying implement a JTextField. I've added the action listener to it and the getters and setters for the text are working, but text that I'm enter isn't showing up in the textfield. I tried setting the text color to black and that didn't help. Honestly, I'm not sure what the issue is. K here's the code. import acm.program.*; import java.awt

问题 K, so unlike with my last question, I've been proactive about trying to deal with this problem a number of times, and it's still not working. Basically I'm trying implement a JTextField. I've added the action listener to it and the getters and setters for the text are working, but text that I'm enter isn't showing up in the textfield. I tried setting the text color to black and that didn't help. Honestly, I'm not sure what the issue is. K here's the code. import acm.program.*; import java.awt

问题 I'm trying to retrieve the text value from a JTextField but first I need to cast a component object (java.awt.Component) to a JTextFiel... mi code is like this Component[] x = this.getComponents(); for(int i = 0; i < x.length; i++) { if (x[i] instanceof JTextComponent) { //retrieve text...something like //(JTextField)x[i].getText(); } } I'm doing this because I know all the controls of mi page are in "x" (JLabels and JTextField) but they are Components and that's why i'm making the cast to

问题 I'm building an application which contains a GUI and a Model. I'm using the Observer pattern (using java's built in interfaces) to update the GUI when fields in the model are changed. This is generally working fine, but I have a situation in which a particular String variable in the model (specifically the url of a file) can be changed by two separate JTextFields (swing) the contents of which actually reflects the value of the model variable in question. The issue I am having comes from the

问题 When i create the KeyListener , it requires the following fields: public void keyPressed(KeyEvent e) { } public void keyReleased(KeyEvent e) { } public void keyTyped(KeyEvent e) { } When i put System.out.println(e) into the keyPressed method, though, it returns this when i press the enter key: java.awt.event.KeyEvent[KEY_PRESSED,keyCode=10,keyText=?,keyChar=?,keyLocation=KEY_LOCATION_STANDARD,rawCode=0,primaryLevelUnicode=0,scancode=0] on javax.swing.JButton[,1,1,100x100,alignmentX=0.0