List of usage examples for java.util Random nextBoolean
public boolean nextBoolean()
From source file:cytoscape.render.immed.GraphGraphicsTest.java
private long drawCurrentFull(Random rand) { final float nodeSizeFactor = 50f; float size = (float) canvasSize; long begin = System.nanoTime(); for (int i = 0; i < numNodes; i++) { float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size); float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size); currentGraphGraphics.drawNodeFull((byte) (i % (int) GraphGraphics.s_last_shape), x, y, (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)), Color.blue, 1.0f + (i % 10), Color.yellow); }/*from w w w. j av a2 s . c om*/ long end = System.nanoTime(); long nodeDur = end - begin; BasicStroke edgeStroke = new BasicStroke(1f); begin = System.nanoTime(); for (int i = 0; i < numEdges; i++) { currentGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red, (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), currentGraphGraphics.m_noAnchors, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, edgeStroke, Color.green); } end = System.nanoTime(); long duration = (end - begin) + nodeDur; // try { // ImageIO.write(image,"PNG",new File("/tmp/homer-current-" + rand.nextInt(100) + ".png")); // } catch (IOException ioe) { ioe.printStackTrace(); } return duration; }
From source file:cytoscape.render.immed.GraphGraphicsTest.java
private long drawOldFull(Random rand) { final float nodeSizeFactor = 50f; float size = (float) canvasSize; long begin = System.nanoTime(); for (int i = 0; i < numNodes; i++) { float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size); float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size); oldGraphGraphics.drawNodeFull((byte) (i % (int) OldGraphGraphics.s_last_shape), x, y, (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)), Color.blue, 1.0f + (i % 10), Color.yellow); }/*ww w . j a v a 2 s. c o m*/ long end = System.nanoTime(); long nodeDur = end - begin; BasicStroke edgeStroke = new BasicStroke(1f); begin = System.nanoTime(); for (int i = 0; i < numEdges; i++) { oldGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red, (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), oldGraphGraphics.m_noAnchors, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, Color.green, 0f); } end = System.nanoTime(); long duration = (end - begin) + nodeDur; // try { // ImageIO.write(image,"PNG",new File("/tmp/homer-old-" + rand.nextInt(100) + ".png")); // } catch (IOException ioe) { ioe.printStackTrace(); } return duration; }
From source file:org.cytoscape.graph.render.immed.GraphGraphicsTest.java
private long drawOldFull(Random rand) { final float nodeSizeFactor = 50f; float size = (float) canvasSize; long begin = System.nanoTime(); for (int i = 0; i < numNodes; i++) { float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size); float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size); oldGraphGraphics.drawNodeFull((byte) (i % (int) OldGraphGraphics.s_last_shape), x, y, (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)), Color.blue, 1.0f + (i % 10), Color.yellow); }/*from w w w . j a v a 2 s. co m*/ long end = System.nanoTime(); long nodeDur = end - begin; BasicStroke edgeStroke = new BasicStroke(1f); begin = System.nanoTime(); for (int i = 0; i < numEdges; i++) { oldGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red, (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), oldGraphGraphics.m_noAnchors, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, Color.green, 0f); } end = System.nanoTime(); long duration = (end - begin) + nodeDur; return duration; }
From source file:org.cytoscape.graph.render.immed.GraphGraphicsTest.java
private long drawCurrentFull(Random rand) { final float nodeSizeFactor = 50f; float size = (float) canvasSize; long begin = System.nanoTime(); for (int i = 0; i < numNodes; i++) { float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size); float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size); currentGraphGraphics.drawNodeFull((byte) (i % (int) GraphGraphics.s_last_shape), x, y, (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)), Color.blue, 1.0f + (i % 10), null, Color.yellow); }/*from w ww .j av a2s .c om*/ long end = System.nanoTime(); long nodeDur = end - begin; BasicStroke edgeStroke = new BasicStroke(1f); begin = System.nanoTime(); for (int i = 0; i < numEdges; i++) { currentGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red, (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), currentGraphGraphics.m_noAnchors, rand.nextFloat() * (rand.nextBoolean() ? size : -size), rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, edgeStroke, Color.green); } end = System.nanoTime(); long duration = (end - begin) + nodeDur; // try { // ImageIO.write(image,"PNG",new File("/tmp/homer-current-" + rand.nextInt(100) + ".png")); // } catch (IOException ioe) { ioe.printStackTrace(); } return duration; }
From source file:org.apache.jackrabbit.core.data.DataStoreTest.java
InputStream readInputStreamRandomly(InputStream in, Random random) throws IOException { ByteArrayOutputStream out = new ByteArrayOutputStream(); byte[] buffer = new byte[8000]; while (true) { if (random.nextBoolean()) { int x = in.read(); if (x < 0) { break; }//w w w . j a v a 2 s . c o m out.write(x); } else { if (random.nextBoolean()) { int l = in.read(buffer); if (l < 0) { break; } out.write(buffer, 0, l); } else { int offset = random.nextInt(buffer.length / 2); int len = random.nextInt(buffer.length / 2); int l = in.read(buffer, offset, len); if (l < 0) { break; } out.write(buffer, offset, l); } } } in.close(); return new ByteArrayInputStream(out.toByteArray()); }
From source file:org.sonar.db.DbSessionImplTest.java
@Test public void all_methods_to_wrapped_SqlSession() { Random random = new Random(); boolean randomBoolean = random.nextBoolean(); int randomInt = random.nextInt(200); String randomStatement = randomAlphabetic(10); Object randomParameter = new Object(); Cursor<Object> mockCursor = mock(Cursor.class); RowBounds rowBounds = new RowBounds(); Object randomObject = new Object(); List<Object> randomList = new ArrayList<>(); Map<Object, Object> randomMap = new HashMap<>(); String randomMapKey = randomAlphabetic(10); ResultHandler randomResultHandler = resultContext -> { // don't care };//from www . jav a 2s .c om List<BatchResult> randomBatchResults = new ArrayList<>(); Configuration randomConfiguration = new Configuration(); verifyDelegation(DbSessionImpl::commit, s -> verify(s).commit()); verifyDelegation(t -> t.commit(randomBoolean), s -> verify(s).commit(randomBoolean)); verifyDelegation(sqlSession -> when(sqlSession.selectCursor(randomStatement)).thenReturn(mockCursor), dbSession -> dbSession.selectCursor(randomStatement), sqlSession -> { verify(sqlSession).selectCursor(randomStatement); return mockCursor; }); verifyDelegation( sqlSession -> when(sqlSession.selectCursor(randomStatement, randomParameter)) .thenReturn(mockCursor), dbSession -> dbSession.selectCursor(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).selectCursor(randomStatement, randomParameter); return mockCursor; }); verifyDelegation( sqlSession -> when(sqlSession.selectCursor(randomStatement, randomParameter, rowBounds)) .thenReturn(mockCursor), dbSession -> dbSession.selectCursor(randomStatement, randomParameter, rowBounds), sqlSession -> { verify(sqlSessionMock).selectCursor(randomStatement, randomParameter, rowBounds); return mockCursor; }); verifyDelegation(sqlSession -> when(sqlSession.selectOne(randomStatement)).thenReturn(randomObject), dbSession -> dbSession.selectOne(randomStatement), sqlSession -> { verify(sqlSession).selectOne(randomStatement); return randomObject; }); verifyDelegation( sqlSession -> when(sqlSession.selectOne(randomStatement, randomParameter)).thenReturn(randomObject), dbSession -> dbSession.selectOne(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).selectOne(randomStatement, randomParameter); return randomObject; }); verifyDelegation(sqlSession -> when(sqlSession.selectList(randomStatement)).thenReturn(randomList), dbSession -> dbSession.selectList(randomStatement), sqlSession -> { verify(sqlSession).selectList(randomStatement); return randomList; }); verifyDelegation( sqlSession -> when(sqlSession.selectList(randomStatement, randomParameter)).thenReturn(randomList), dbSession -> dbSession.selectList(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).selectList(randomStatement, randomParameter); return randomList; }); verifyDelegation( sqlSession -> when(sqlSession.selectList(randomStatement, randomParameter, rowBounds)) .thenReturn(randomList), dbSession -> dbSession.selectList(randomStatement, randomParameter, rowBounds), sqlSession -> { verify(sqlSessionMock).selectList(randomStatement, randomParameter, rowBounds); return randomList; }); verifyDelegation( sqlSession -> when(sqlSession.selectMap(randomStatement, randomMapKey)).thenReturn(randomMap), dbSession -> dbSession.selectMap(randomStatement, randomMapKey), sqlSession -> { verify(sqlSession).selectMap(randomStatement, randomMapKey); return randomMap; }); verifyDelegation( sqlSession -> when(sqlSession.selectMap(randomStatement, randomParameter, randomMapKey)) .thenReturn(randomMap), dbSession -> dbSession.selectMap(randomStatement, randomParameter, randomMapKey), sqlSession -> { verify(sqlSessionMock).selectMap(randomStatement, randomParameter, randomMapKey); return randomMap; }); verifyDelegation( sqlSession -> when(sqlSession.selectMap(randomStatement, randomParameter, randomMapKey, rowBounds)) .thenReturn(randomMap), dbSession -> dbSession.selectMap(randomStatement, randomParameter, randomMapKey, rowBounds), sqlSession -> { verify(sqlSessionMock).selectMap(randomStatement, randomParameter, randomMapKey, rowBounds); return randomMap; }); verifyDelegation(dbSession -> dbSession.select(randomStatement, randomResultHandler), sqlSession -> verify(sqlSessionMock).select(randomStatement, randomResultHandler)); verifyDelegation(dbSession -> dbSession.select(randomStatement, randomParameter, randomResultHandler), sqlSession -> verify(sqlSession).select(randomStatement, randomParameter, randomResultHandler)); verifyDelegation( dbSession -> dbSession.select(randomStatement, randomParameter, rowBounds, randomResultHandler), sqlSession -> verify(sqlSessionMock).select(randomStatement, randomParameter, rowBounds, randomResultHandler)); verifyDelegation(sqlSession -> when(sqlSession.insert(randomStatement)).thenReturn(randomInt), dbSession -> dbSession.insert(randomStatement), sqlSession -> { verify(sqlSession).insert(randomStatement); return randomInt; }); verifyDelegation( sqlSession -> when(sqlSession.insert(randomStatement, randomParameter)).thenReturn(randomInt), dbSession -> dbSession.insert(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).insert(randomStatement, randomParameter); return randomInt; }); verifyDelegation(sqlSession -> when(sqlSession.update(randomStatement)).thenReturn(randomInt), dbSession -> dbSession.update(randomStatement), sqlSession -> { verify(sqlSession).update(randomStatement); return randomInt; }); verifyDelegation( sqlSession -> when(sqlSession.update(randomStatement, randomParameter)).thenReturn(randomInt), dbSession -> dbSession.update(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).update(randomStatement, randomParameter); return randomInt; }); verifyDelegation(sqlSession -> when(sqlSession.delete(randomStatement)).thenReturn(randomInt), dbSession -> dbSession.delete(randomStatement), sqlSession -> { verify(sqlSession).delete(randomStatement); return randomInt; }); verifyDelegation( sqlSession -> when(sqlSession.delete(randomStatement, randomParameter)).thenReturn(randomInt), dbSession -> dbSession.delete(randomStatement, randomParameter), sqlSession -> { verify(sqlSessionMock).delete(randomStatement, randomParameter); return randomInt; }); verifyDelegation(DbSessionImpl::rollback, s -> verify(s).rollback()); verifyDelegation(t -> t.rollback(randomBoolean), s -> verify(s).rollback(randomBoolean)); verifyDelegation(sqlSession -> when(sqlSession.flushStatements()).thenReturn(randomBatchResults), DbSessionImpl::flushStatements, sqlSession -> { verify(sqlSession).flushStatements(); return randomBatchResults; }); verifyDelegation(DbSessionImpl::close, s -> verify(s).close()); verifyDelegation(DbSessionImpl::clearCache, s -> verify(s).clearCache()); verifyDelegation(sqlSession -> when(sqlSession.getConfiguration()).thenReturn(randomConfiguration), DbSessionImpl::getConfiguration, sqlSession -> { verify(sqlSession).getConfiguration(); return randomConfiguration; }); verifyDelegation( sqlSession -> when(sqlSession.getMapper(DbSessionImplTest.class)) .thenReturn(DbSessionImplTest.this), dbSession -> dbSession.getMapper(DbSessionImplTest.class), sqlSession -> { verify(sqlSession).getMapper(DbSessionImplTest.class); return DbSessionImplTest.this; }); verifyDelegation(DbSessionImpl::getConnection, s -> verify(s).getConnection()); }
From source file:com.mapr.synth.samplers.VectorSamplerTest.java
@Test public void testVector() throws IOException { SchemaSampler s = new SchemaSampler( Resources.asCharSource(Resources.getResource("schema029.json"), Charsets.UTF_8).read()); for (int i = 0; i < 10; i++) { JsonNode data = s.sample();/* w w w. ja v a2s . c o m*/ /* { "class": "vector", "name": "prices", "mean": 4.65, "sd": 0.01, "length": 10000, "transform": "exp", "seed": 1, }, */ JsonNode v = data.get("prices"); assertTrue(v.isArray()); assertEquals(10000, v.size()); double[] v1 = new double[10000]; double[] v2 = new double[10000]; for (int j = 0; j < 10000; j++) { v1[j] = v.get(j).asDouble(); v2[j] = Math.log(v1[j]); } assertEquals(100, median(v1), 0.03); assertEquals(100, mean(v1), 0.05); assertEquals(Math.log(100), mean(v2), 0.001); assertEquals(0.01, sd(v2), 0.0003); assertTrue(isNormal(v2, Math.log(100), 0.01)); /* { "class": "vector", "name": "zero", "mean": 0, "sd": 10, "length": 10000, "seed": 2 }, */ v = data.get("zero"); assertTrue(v.isArray()); for (int j = 0; j < 10000; j++) { v1[j] = v.get(j).asDouble(); } assertEquals(0, mean(v1), 0.3); assertEquals(10, sd(v1), 0.2); assertTrue(isNormal(v1, 0, 10)); /* { "class": "vector", "name": "clipped", "mean": 0, "sd": 10, "length": 10000, "max": 0, "seed": 3 }, */ v = data.get("clipped"); assertTrue(v.isArray()); Random rand = new Random(); for (int j = 0; j < 10000; j++) { v1[j] = v.get(j).asDouble(); assertTrue(v1[j] <= 0); v1[j] = v1[j] * (rand.nextBoolean() ? 1 : -1); } assertEquals(0, mean(v1), 0.3); assertEquals(10, sd(v1), 0.3); assertTrue(isNormal(v1, 0, 10)); /* { "class": "vector", "name": "ten", "min": 1, "max": 10, "length": 20000, "transform": "log", "seed": 4 } ] */ v = data.get("ten"); assertTrue(v.isArray()); for (int j = 0; j < 10000; j++) { v1[j] = v.get(j).asDouble(); v2[j] = Math.exp(v1[j]); assertTrue(v1[j] >= 1); assertTrue(v1[j] <= 10); } assertTrue(isUniform(v2, Math.exp(1), Math.exp(10))); v = data.get("coarse"); assertTrue(v.isArray()); for (int j = 0; j < 10000; j++) { double x = v.get(j).asDouble(); assertTrue(x >= 1); assertTrue(x <= 10); assertEquals(Math.rint(x / 0.1) * 0.1, x, 1e-10); } } }
From source file:org.lathanh.android.mvp.demo.presenter.PresenterDemo_Fragment.java
/** * Starts a task to "load data."/*from w w w .jav a 2 s . c o m*/ * * The data is a heterogeneous list of {@link PresenterDemo_RedPresenter Red} * and {@link PresenterDemo_GreenPresenter Green} items, which have slightly * different visual and onLongClick behavior. */ @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); final long debugLoadStartTime = System.currentTimeMillis(); new AsyncTask<Void, Void, List>() { private PresenterDemo_GreenPresenter greenPresenter; private PresenterDemo_RedPresenter redPresenter; @Override protected List doInBackground(Void... params) { //-- "Load" data Random random = new Random(0xABCDEF); // same "randomness" every run List dataModels = new ArrayList(NUM_LIST_ELEMENTS); for (int i = 0; i < NUM_LIST_ELEMENTS; i++) { int delayForItem = 6 + random.nextInt(11); if (random.nextBoolean()) { // green dataModels.add(new GreenAdaptableViewModel(i, delayForItem, new Date())); } else { // red dataModels.add(new RedAdaptableViewModel(i, delayForItem, System.currentTimeMillis())); } } //-- Also prepare the Presenters for this data greenPresenter = new PresenterDemo_GreenPresenter(); redPresenter = new PresenterDemo_RedPresenter(); return dataModels; } @Override protected void onPostExecute(List list) { //-- Create the BindingAdapter and add the Presenters to it BindingAdapter bindingAdapter = new BindingAdapter(LayoutInflater.from(getContext()), list); bindingAdapter.addPresenter(greenPresenter.getLayoutId(), greenPresenter, greenPresenter, greenPresenter); bindingAdapter.addPresenter(redPresenter.getLayoutId(), redPresenter, redPresenter, redPresenter); RecyclerView recyclerView = (RecyclerView) getActivity().findViewById(R.id.recycler_view); recyclerView.setAdapter(bindingAdapter); //-- Update view to show list getActivity().findViewById(R.id.loadingView).setVisibility(View.GONE); recyclerView.setVisibility(View.VISIBLE); long debugElapsedMs = System.currentTimeMillis() - debugLoadStartTime; Toast.makeText(getActivity(), "Load completed in " + debugElapsedMs + "ms", Toast.LENGTH_SHORT) .show(); } }.execute(); }
From source file:org.apache.hadoop.hbase.io.encoding.TestChangingEncoding.java
@Test public void testCrazyRandomChanges() throws Exception { prepareTest("RandomChanges"); Random rand = new Random(2934298742974297L); for (int i = 0; i < 20; ++i) { int encodingOrdinal = rand.nextInt(DataBlockEncoding.values().length); DataBlockEncoding encoding = DataBlockEncoding.values()[encodingOrdinal]; setEncodingConf(encoding, rand.nextBoolean()); writeSomeNewData();//www . j ava2 s. c o m verifyAllData(); } }
From source file:org.apache.hadoop.io.TestArrayOutputStream.java
private void runComparison(ArrayOutputStream aos, DataOutputStream dos, ByteArrayOutputStream bos) throws IOException { Random r = new Random(); // byte//from w w w .jav a 2s. com int b = r.nextInt(128); aos.write(b); dos.write(b); // byte[] byte[] bytes = new byte[10]; r.nextBytes(bytes); aos.write(bytes, 0, 10); dos.write(bytes, 0, 10); // Byte aos.writeByte(b); dos.writeByte(b); // boolean boolean bool = r.nextBoolean(); aos.writeBoolean(bool); dos.writeBoolean(bool); // short short s = (short) r.nextInt(); aos.writeShort(s); dos.writeShort(s); // char int c = r.nextInt(); aos.writeChar(c); dos.writeChar(c); // int int i = r.nextInt(); aos.writeInt(i); dos.writeInt(i); // long long l = r.nextLong(); aos.writeLong(l); dos.writeLong(l); // float float f = r.nextFloat(); aos.writeFloat(f); dos.writeFloat(f); // double double d = r.nextDouble(); aos.writeDouble(d); dos.writeDouble(d); // strings String str = RandomStringUtils.random(20); aos.writeBytes(str); aos.writeChars(str); aos.writeUTF(str); dos.writeBytes(str); dos.writeChars(str); dos.writeUTF(str); byte[] expected = bos.toByteArray(); assertEquals(expected.length, aos.size()); byte[] actual = new byte[aos.size()]; System.arraycopy(aos.getBytes(), 0, actual, 0, actual.length); // serialized bytes should be the same assertTrue(Arrays.equals(expected, actual)); }