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  1. PO
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    <p>Okay, I got it. I don't like accepting my own answers but here we go. At the end of the day I am trying to get the whole lot to bunch together properly at the top of the container. Adding <code>weighty</code> attributes to all the components individually means that the remaining space in the container is distributed between all of them (relative to their <code>weighty</code> attribute) therefore spacing them out.</p> <p>The answer seems to be that by adding a <code>weighty</code> attribute to the lowest component in the GridBagLayout, the rest of the remaining space is allocated to below the lowest component and therefore pushing all components to the top. By default is seems that when remaining space is allocated to a component based on it's weight, it is allocated <strong>below</strong> it (at least on the y axis).</p> <p>Here is the new code with three components to help demonstrate;</p> <pre><code> // Instantiate components and configure their corresponding GridBagConstraints attributes // refPlusType properties refPlusType = new JLabel("&lt;html&gt;&lt;h3&gt;"+"Reference"+" - "+"Job Type"+" &lt;/h3&gt;&lt;hr /&gt;&lt;/html&gt;"); refPlusTypeGC = new GridBagConstraints(); refPlusTypeGC.gridx = 0; // Grid position refPlusTypeGC.gridy = 0; refPlusTypeGC.gridwidth = 2; // Number of colums occupied by component refPlusTypeGC.insets = new Insets(5, 10, 5, 10); // Specifies margin // addressLine1 properties addressLine1 = new JTextField(); addressLine1GC = new GridBagConstraints(); addressLine1GC.gridx = 0; addressLine1GC.gridy = 1; addressLine1GC.gridwidth = 2; addressLine1GC.insets = new Insets(0, 10, 0, 10); addressLine1GC.fill = GridBagConstraints.HORIZONTAL; // Specifies component fill Horizontal space // addressLine2 properties addressLine2 = new JTextField(); addressLine2GC = new GridBagConstraints(); addressLine2GC.gridx = 0; addressLine2GC.gridy = 2; addressLine2GC.gridwidth = 2; addressLine2GC.insets = new Insets(0, 10, 0, 10); addressLine2GC.fill = GridBagConstraints.HORIZONTAL; // Specifies component fill Horizontal space addressLine2GC.weighty = 1; // Required for anchor to work. addressLine2GC.anchor = GridBagConstraints.NORTH; // Position in container // Add components to this HALLogisticsDetailsPanel this.add(refPlusType, refPlusTypeGC); this.add(addressLine1, addressLine1GC); this.add(addressLine2, addressLine2GC); </code></pre>
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    1. POJava Swing GridBagLayout Component Positioning
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    1. USRudi Kershaw
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    1. CO`weightx/weighty` indicate how you want extra horizontal/vertical space to be distributed. GridBagLayout will first attempt to allocate the preferred size of each component to each of them. If any horizontal/vertical space is left, then it will sum all the corresponding weights and allocate the extra space with the proportional weight.
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      1. USGuillaume Polet
    2. COIf you take a basic example where you have 3 components (c1, c2, c3) aligned next to each other vertically. The container has a height of 100px and the three component require 10, 20 and 30px (total makes 60px and there are extra 40px vertically). Imagine that c1 and c2 have declared a weighty of 1 and that c3 has declared a weighty of 3 (total of weighty is 5). c1 and c2 will have 1/5 of the extra space-->8px while c3 will get 3/5 of the 40px-->24px. In the end, c1 will have a "cell" of 18px high, c2 will have a cell of 28px high, while c3 will get 54px high (total is then equal to 100px).
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      1. USGuillaume Polet
    3. COThank you Guillaume, that now makes much more sense. I will edit my question to give a brief overview of what the finished product is intended to look like, and if you edit your answer to reflect what you've told me in these comments and amend the code then I'll accept your answer.
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      1. USRudi Kershaw
 

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