java-bin-packer

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java-bin-packer

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Java Version of a Bin Packer Algorithm to fit many blocks. Handles one or more bins.

java-bin-packer 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# java-bin-packer
Java Version of a bin-packer at https://github.com/jakesgordon/bin-packing/. jakesgordon made an awesome job explaining his code at http://codeincomplete.com/posts/2011/5/7/bin_packing/

I translated the forementioned code to Java, since I saw it as a simple way to balance virtual machines in different hosts. But that is a complete different story.

The code preserves the functionality of the original javascript code, except that I added the option to handle more than 1 bin.

<h2>Demo</h2>
Clone the code 
<code>git@github.com:alexbonilla/java-bin-packer.git</code>
com/iveloper/utils/packer/example/JavaBinPacker.java contains a running example you can play with.

<h2>Usage</h2>
<p>If you want to use it inside your project, you need to do something like this:</p>
<code>
        
        Packer packer = new Packer(2, 600, 800);// 2 available bins to fill, 600x800 each
        ArrayList<Node> blocks = new ArrayList();

blocks.add(new Node("Figure1", 300, 400));
        blocks.add(new Node("Figure2", 300, 400));
        blocks.add(new Node("Figure3", 300, 400));
        blocks.add(new Node("Figure4", 300, 400));
        blocks.add(new Node("Figure5", 300, 400));
        blocks.add(new Node("Figure6", 300, 400));
        blocks.add(new Node("Figure7", 300, 400));
        blocks.add(new Node("Figure8", 300, 400));
        blocks.add(new Node("Figure9", 300, 400));

Collections.sort(blocks, new Comparator<Node>() {
            @Override
            public int compare(Node a, Node b) {

return (Double.compare(b.w, a.w)); //doing the sort based on the width, you can change it accordingly to your needs.
            }
        });

packer.fit(blocks);
        Iterator<Node> blocksItr = blocks.iterator();
        while (blocksItr.hasNext()) {
            Node block = blocksItr.next();
            if (block.fit != null) {
                if (block.fit.isroot) {
                    System.out.format("%32s", "Pack Starts Here");
                    System.out.println("");
                    System.out.format("%32s%24s%16s%16s%16s", "Display name", "x", "y", "w", "h");
                    System.out.println("");
                }
                System.out.format("%32s%24s%16s%16s%16s", block.name, block.fit.x, block.fit.y, block.w, block.h);
                System.out.println("");
            }
        }

System.out.println("");
</code>

The example above will produce this output:

1st Pack Starts Here
|Display name |                     x   |           y    |          w    |          h |
|-----------------|-----------------|-----------------|-----------------|-----------------|
|Figure1      |              0.0        |    0.0         | 300.0         | 400.0|
|Figure2      |            300.0        |    0.0         | 300.0         | 400.0|
|Figure3      |              0.0        |  400.0         | 300.0         | 400.0|
|Figure4      |            300.0        |  400.0         | 300.0         | 400.0|

2nd Pack Starts Here
|Display name |                     x    |          y    |         w     |         h |
|-----------------|-----------------|-----------------|-----------------|-----------------|
|Figure5      |              0.0         |   0.0         | 300.0         | 400.0|
|Figure6      |            300.0         |   0.0         | 300.0         | 400.0|
|Figure7      |              0.0         | 400.0         | 300.0         | 400.0|
|Figure8      |            300.0         | 400.0         | 300.0         | 400.0|

In the example, Figure9 does not fit in either the two of the bins, since both are already full.

See source code comments for more details.

<h2>License</h2>
See <a href="https://github.com/alexbonilla/java-bin-packer/blob/master/LICENSE">LICENSE</a> file.

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