Pair Game

.gitignore

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+.idea
+.gradle
+build

.travis.yml

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+language: java
+
+jdk:
+- oraclejdk8
+
+sudo: false
+addons:
+  apt:
+    packages:
+      - oracle-java8-installer

build.gradle

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+group 'ru.spbau.shevchenko'
+version '1.0-SNAPSHOT'
+
+apply plugin: 'java'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testCompile group: 'junit', name: 'junit', version: '4.11'
+    compile group: 'org.reactfx', name: 'reactfx', version: '2.0-M5'
+}

gradle/wrapper/gradle-wrapper.properties

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+#Thu May 11 15:40:34 MSK 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-bin.zip

settings.gradle

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+rootProject.name = 'PairGame'
+

src/main/java/Field.java

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+import java.util.ArrayList;
+import java.util.Collections;
+
+class Field {
+    private final int[][] field;
+
+    Field(int n){
+        if (n % 2 == 1) {
+            throw new IllegalArgumentException("N should be even!");
+        }
+        field = new int[n][n];
+        ArrayList<Integer> bits = new ArrayList<>();
+        for (int i = 0; i < n*n; i++) {
+            bits.add(i % 2);
+        }
+        Collections.shuffle(bits);
+        for (int i = 0; i < n; i++) {
+            for (int j = 0; j < n; j++) {
+                field[i][j] = bits.get(i*n + j);
+            }
+        }
+    }
+
+    int get(int i, int j){
+        return field[i][j];
+    }
+
+
+}