The WrapLayout extends FlowLayout and overrides the preferred size calculation to give the. So the solution is to use a different layout manager. The default preferred size calculation for a FlowLayout assumes a single row of components. The value of the alignment argument must be one of FlowLayout.LEFT, FlowLayout.RIGHT, FlowLayout.CENTER, FlowLayout.LEADING, or FlowLayout.TRAILING. The default Orientation for flow layout is left to right, however we can set it to right to left if want. Correct, the preferredSize () needs to be dynamically calculated as components are added to the panel. Constructs a new FlowLayout with the specified alignment and a default 5-unit horizontal and vertical gap. Public class FlowLayoutDemo extends Frame Flow Layout where Orientation is right to left final NullPointerException result new NullPointerException(String.format(getLoggingLocale(), nullParamNPEstr(), name)) final StackTraceElement st. Here we are adding 8 buttons to a Frame and layout is being set to FlowLayout. The image shown above is the output of this code. How to solve null pointer exception Here is my code. By default the components Orientation is left to right, which means the components would be added from left to right, however we can change it to right to left as well, we will see that later in this post.The default horizontal and vertical gap between components is 5 pixels.However we can set the alignment to left or right, we will learn about it later in this post. As you can see in the above image that buttons 7 & 8 are in center. All rows in Flow layout are center aligned by default.As you can see buttons 7 & 8 are in second row because first six buttons consumed all horizontal space. Flow layout puts components (such as text fields, buttons, labels etc) in a row, if horizontal space is not enough to hold all components then Flow layout adds them in a next row and so on.Įxample: Here is the image of a Frame where eight buttons have been added to a Frame under Flow layout. Flow layout is the default layout, which means if you don’t set any layout in your code then layout would be set to Flow by default.
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