swing

问题 I need to remove row from JTable. Here is my code : import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.GridLayout; import javax.swing.JPanel; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame;

问题 I have created Jtree with Root node and 4Subnodes. My problem is like this: I need to change the foreground and background color of a particular node dynamically. How can i do it? Help me with some piece of code. Thank you all in advance... 回答1: How can i do it? I'm sure that JTree tutorial contains valuable info about DefaultTreeCellRenderer, Help me with some piece of code. tons of examples here or here or here 回答2: One easy way I found was to include HTML markup in the node text. The

问题 I wasn't quite sure how to word the title of this question. Basically I'm making space invaders with JFrames, and using KeyBindings for keyboard input. The keybindings work fine, and I can move the ship around without a problem. However, if I hold down a key, the ship moves 5 pixels and then pauses for about half a second, after which it moves smoothly. When the key is pressed, my code increases the ship's speed (which moves the ship by 5-10 pixels every frame). I'm assuming this is a common

问题 I'm doing a program in which there are 8 shapes contained in an array that will be displayed when you click the mouse. I am new to Java and not that familiar with event handlers and listeners. I am trying to make the shapes appear at the location the mouse is clicked at inside the frame yet I am having trouble since the constructor of each shape use 2 Points as its parameter. Here's an example from the code: import MyLibs.Circle; import MyLibs.Rectangle; import MyLibs.Shape; import java.awt

问题 Let's say i have a listener attached to a button. When i press this button, actionPerformed is called and i set a label as visible. Then the calculate() method runs(which has some really long calculations inside it and it takes time). Then i wanna print the results with the show() method. Thing is that i know for a fact that the label will be set as visible after all the code inside actionPerformed will be executed. So my question is : How should i set the calculate method to run on

问题 Let's say i have a listener attached to a button. When i press this button, actionPerformed is called and i set a label as visible. Then the calculate() method runs(which has some really long calculations inside it and it takes time). Then i wanna print the results with the show() method. Thing is that i know for a fact that the label will be set as visible after all the code inside actionPerformed will be executed. So my question is : How should i set the calculate method to run on

问题 Let's say i have a listener attached to a button. When i press this button, actionPerformed is called and i set a label as visible. Then the calculate() method runs(which has some really long calculations inside it and it takes time). Then i wanna print the results with the show() method. Thing is that i know for a fact that the label will be set as visible after all the code inside actionPerformed will be executed. So my question is : How should i set the calculate method to run on

问题 Let's say i have a listener attached to a button. When i press this button, actionPerformed is called and i set a label as visible. Then the calculate() method runs(which has some really long calculations inside it and it takes time). Then i wanna print the results with the show() method. Thing is that i know for a fact that the label will be set as visible after all the code inside actionPerformed will be executed. So my question is : How should i set the calculate method to run on

问题 Recently I'm building a java swing application and want to add a custom cursor. I used the following code, public void customCursor() { Toolkit toolkit = Toolkit.getDefaultToolkit(); Image image = toolkit.getImage("pencil.gif"); Point hotspot = new Point(0,0); Cursor cursor = toolkit.createCustomCursor(image, hotspot, "pencil"); setCursor(cursor); } And call the customCursor() method inside constructor. When i run the application my cursor is invisible. I tried giving the absolute path and

问题 Recently I'm building a java swing application and want to add a custom cursor. I used the following code, public void customCursor() { Toolkit toolkit = Toolkit.getDefaultToolkit(); Image image = toolkit.getImage("pencil.gif"); Point hotspot = new Point(0,0); Cursor cursor = toolkit.createCustomCursor(image, hotspot, "pencil"); setCursor(cursor); } And call the customCursor() method inside constructor. When i run the application my cursor is invisible. I tried giving the absolute path and