class Graph {
    int  NOT_VISIT = 0;
    int      VISIT = 1;
    int LAST_VISIT = 2;

    private class GraphNode {
        ArrayList<Integer> link = new ArrayList<Integer>();
        int type = 0;
    }

    ArrayList<GraphNode> nodes = new ArrayList<GraphNode>();
    ArrayList<Integer> removes = new ArrayList<Integer>();

    int MAX_COUNT = 4;

    public void createGraph(int n){
        removes.clear();
        nodes.clear();
        for(int i = 0; i < n; i++){
            nodes.add(new GraphNode());
        }
    }

    public void addEdge(int a, int b){
        nodes.get(a).link.add(b);
        nodes.get(b).link.add(a);
    }

    public void bfs(int startNode){
        int count = 1;
        Queue<GraphNode> queue = new LinkedList<GraphNode>();
        queue.add(nodes.get(startNode));
        nodes.get(startNode).type = VISIT;
        while(!queue.isEmpty()) {
            GraphNode node = queue.remove();

            for(int i : node.link){
                GraphNode localNode = nodes.get(i);
                if(localNode.type == NOT_VISIT){
                    localNode.type = VISIT;
                    queue.add(localNode);
                    count++;
                }
            }
        }

        if(count >= MAX_COUNT){
            for(int i = 0; i < nodes.size(); i++){
                if(nodes.get(i).type == VISIT){
                    removes.add(i);
                }
            }
        }

        for(GraphNode node : nodes){
            if(node.type == VISIT){
                node.type = LAST_VISIT;
            }
        }
    }

    public ArrayList<Integer> searchBigGroups(){
        for(int i = 0; i < nodes.size(); i++){
            if(nodes.get(i).type == NOT_VISIT){
                bfs(i);
            }
        }

        Collections.sort(removes, Collections.reverseOrder());
        return removes;
    }
}

graphBall.createGraph(pBalls.size());

for (Contact contact : world.getContactList()) {
    if (contact.isTouching()) {
        if (contact.getFixtureA().getShape() instanceof CircleShape &&
                contact.getFixtureB().getShape() instanceof CircleShape) {
            if (contact.getFixtureA().getBody().getUserData() != null &&
                    contact.getFixtureB().getBody().getUserData() != null) {
                int a = (Integer) contact.getFixtureA().getBody().getUserData();
                int b = (Integer) contact.getFixtureB().getBody().getUserData();

                if (pBalls.get(a).color == pBalls.get(b).color) {
                    //graphBall.addEdge(a, b);
                }
            }
        }
    }
}

ArrayList<Integer> tmp = graphBall.searchBigGroups();
score += tmp.size() * 3;

for (int index : tmp) {
    // Удаляем все найденное 
    world.destroyBody(pBalls.get(index).body);
    pBalls.remove(index);
}

Error:Cannot invoke method multiply() on null object

Error:No such property: ABI for class: org.gradle.api.tasks.OutputFile

// map for the version code

ext.versionCodes = ['armeabi-v7a':1, mips:2, x86:3]

import com.android.build.OutputFile

android.applicationVariants.all { variant ->
    // assign different version code for each output
    variant.outputs.each { output ->
        output.versionCodeOverride =
                project.ext.versionCodes.get(output.getFilter(OutputFile.ABI)) * 1000000 + android.defaultConfig.versionCode
    }
}

android {
    buildToolsVersion "20.0.0"
    compileSdkVersion 20
    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }


        instrumentTest.setRoot('tests')
    }
    defaultConfig {
        versionCode 11
        versionName '1.3'
    }
    productFlavors {
    }

    splits {
        abi {
            enable true
            reset()
            include 'x86', 'armeabi-v7a', 'armeabi'
            universalApk true
        }
    }





}




// needed to add JNI shared libraries to APK when compiling on CLI
tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
    pkgTask.jniFolders = new HashSet<File>()
    pkgTask.jniFolders.add(new File(projectDir, 'libs'))
}
// called every time gradle gets executed, takes the native dependencies of
// the natives configuration, and extracts them to the proper libs/ folders
// so they get packed with the APK.
task copyAndroidNatives() {
    file("libs/armeabi/").mkdirs();
    file("libs/armeabi-v7a/").mkdirs();
    file("libs/x86/").mkdirs();

    configurations.natives.files.each { jar ->
        def outputDir = null
        if (jar.name.endsWith("natives-armeabi-v7a.jar")) outputDir = file("libs/armeabi-v7a")
        if (jar.name.endsWith("natives-armeabi.jar")) outputDir = file("libs/armeabi")
        if (jar.name.endsWith("natives-x86.jar")) outputDir = file("libs/x86")
        if (outputDir != null) {
            copy {
                from zipTree(jar)
                into outputDir
                include "*.so"
            }
        }
    }
}
task run(type: Exec) {
    def path
    def localProperties = project.file("../local.properties")
    if (localProperties.exists()) {
        Properties properties = new Properties()
        localProperties.withInputStream { instr ->
            properties.load(instr)
        }
        def sdkDir = properties.getProperty('sdk.dir')
        if (sdkDir) {
            path = sdkDir
        } else {
            path = "$System.env.ANDROID_HOME"
        }
    } else {
        path = "$System.env.ANDROID_HOME"
    }

    def adb = path + "/platform-tools/adb"
    commandLine "$adb", 'shell', 'am', 'start', '-n', 'com.mygdx.crazyball.android/com.mygdx.crazyball.android.AndroidLauncher'
}
// sets up the Android Eclipse project, using the old Ant based build.
eclipse {
    // need to specify Java source sets explicitely, SpringSource Gradle Eclipse plugin
    // ignores any nodes added in classpath.file.withXml
    sourceSets {
        main {
            java.srcDirs "src", 'gen'
        }
    }

    jdt {
        sourceCompatibility = 1.6
        targetCompatibility = 1.6
    }

    classpath {
        plusConfigurations += [project.configurations.compile]
        containers 'com.android.ide.eclipse.adt.ANDROID_FRAMEWORK', 'com.android.ide.eclipse.adt.LIBRARIES'
    }

    project {
        name = appName + "-android"
        natures 'com.android.ide.eclipse.adt.AndroidNature'
        buildCommands.clear();
        buildCommand "com.android.ide.eclipse.adt.ResourceManagerBuilder"
        buildCommand "com.android.ide.eclipse.adt.PreCompilerBuilder"
        buildCommand "org.eclipse.jdt.core.javabuilder"
        buildCommand "com.android.ide.eclipse.adt.ApkBuilder"
    }
}
// sets up the Android Idea project, using the old Ant based build.
idea {
    module {
        sourceDirs += file("src");
        scopes = [COMPILE: [plus: [project.configurations.compile]]]

        iml {
            withXml {
                def node = it.asNode()
                def builder = NodeBuilder.newInstance();
                builder.current = node;
                builder.component(name: "FacetManager") {
                    facet(type: "android", name: "Android") {
                        configuration {
                            option(name: "UPDATE_PROPERTY_FILES", value: "true")
                        }
                    }
                }
            }
        }
    }
}
dependencies {
}

ext.versionCodes = ['armeabi-v7a':1, 'armeabi':2, 'x86':3]

try {
    UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
}
catch (Exception e) {
    //Exception handle
}

//

Object[] options = {"Yes, please",
        "No, thanks",
        "No eggs, no ham!"};

int n = JOptionPane.showOptionDialog(f,
        "Would you like some green eggs to go "
                + "with that ham?",
        "A Silly Question",
        JOptionPane.YES_NO_CANCEL_OPTION,
        JOptionPane.QUESTION_MESSAGE,
        null,
        options,
        options[2]);

Error parsing gtk-icon-sizes string: ''

in <YOUR THEME>/gtk-2.0/gtkrc:
gtk-icon-sizes =
"panel-menu=24,24:panel=20,20:gtk-button=18,18:gtk-large-toolbar=24,24"

UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");

[[if something]]
// Специфичный код тут
// Специфичный код тут
// Специфичный код тут
[[endif something]] 

for(int i : node.link){
    if(nodes.get(i).type == 0){
        nodes.get(i).type = 1;
        queue.add(nodes.get(i));
        count++;
    }
}

for(int i = 0; i < node.link.size(); i++){
    if(nodes.get(node.link.get(i)).type == 0) {
        nodes.get(node.link.get(i)).type = 1;
        queue.add(nodes.get(node.link.get(i)));
        count++;
    }
}