Java unwanted border on JPanel when drawing

Java unwanted border on JPanel when drawing

By : Rashed
Date : November 20 2020, 01:01 AM
may help you . You need to call setResizeable(false) on your frame before you call pack(). Calling pack() will size the frame to fit its components. Making the frame non-resizeable afterwards will give it thinner borders, which will increase the amount of space inside the frame.
code :

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Unwanted border around JPanel

Unwanted border around JPanel

By : Fleeto
Date : March 29 2020, 07:55 AM
To fix this issue Different layout managers use different rules for computing actual managed controls sizes, i.e. you can't expect that the panel has particular size only if you call 'setPreferredSize()' on it.
Feel free to check javadoc for all target layout managers for more details about used algorithm in every particular case.
Java JPanel on top of JPanel (Drawing on top of drawing)

Java JPanel on top of JPanel (Drawing on top of drawing)

By : user3661083
Date : March 29 2020, 07:55 AM
it fixes the issue
How do I draw another line or anything else on top of this white square whithout drawing the line in the Graphs paintComponent method?
Unwanted JPanel border in JFrame

Unwanted JPanel border in JFrame

By : user3237749
Date : March 29 2020, 07:55 AM
wish of those help I am trying to fill JFrame with a JPanel and colour that JPanel, but for some reason I get a border on the bottom right edges. , You're short-circuiting the paint chain with this method
code :
public void paint(Graphics g) {
    public void paintComponent(Graphics g) {
        g.fillRect(0, 0, getWidth(), getHeight());
Drawing in java with JPanel

Drawing in java with JPanel

By : user3518662
Date : March 29 2020, 07:55 AM
like below fixes the issue Presuming the Client is using a MouseListener (or MouseMotionListener): the MouseListener can only fire as fast as a certain interval. For example when the mouse is constantly moved your listener will receive a MouseEvent for every interval rather than every pixel. As a result, moving the mouse fast may result in drawing items that are not adjacent to each other. AFAIK, you cannot increase the speed, but you can draw lines between two sequential points making them look continuous (eg by using a List of each event location and using g.drawLine on each two adjacent points in the List).
Other notes:
Drawing image behind border in Swing JPanel

Drawing image behind border in Swing JPanel

By : Navya
Date : March 29 2020, 07:55 AM
will be helpful for those in need I've created a JFrame which contains a JPanel in a MigLayout. , Change...
code :
public void paint(Graphics g)
    if (image != null)
        g.drawImage(image, 0, 0, (int) getSize().getWidth() - 0, (int) getSize().getHeight() - 0, this);
protected void paintComponent(Graphics g) {
    if (image != null) {
        g.drawImage(image, 0, 0, (int) getSize().getWidth() - 0, (int) getSize().getHeight() - 0, this);
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