Merge branch 'master' of git.oschina.net:eh3/useful-code

src/main/java/osc/git/eh3/test/TestCountDownLatch.java

@@ -0,0 +1,47 @@
+package osc.git.eh3.test;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CountDownLatch;
+public class TestCountDownLatch {
+	private static final int N = 10;
+
+	private static Map<String, Object> cache = new ConcurrentHashMap<String, Object>();
+
+	public static void main(String[] args) throws InterruptedException {
+		CountDownLatch doneSignal = new CountDownLatch(N);
+
+		for (int i = 1; i <= N; i++) {
+			new Thread(new Worker(i, doneSignal)).start();// 线程启动了
+		}
+		System.out.println("begin------------");
+		doneSignal.await();// 等待所有的线程执行完毕
+		System.out.println("Ok");
+
+		System.out.println(cache.size());
+
+		Set<String> keySet = cache.keySet();
+		for (String key : keySet) {
+			System.out.println(key + " = " + cache.get(key));
+		}
+	}
+
+	static class Worker implements Runnable {
+		private final CountDownLatch doneSignal;
+		private int beginIndex;
+
+		Worker(int beginIndex, CountDownLatch doneSignal) {
+			this.beginIndex = beginIndex;
+			this.doneSignal = doneSignal;
+		}
+
+		public void run() {
+			beginIndex = (beginIndex - 1) * 10 + 1;
+			for (int i = beginIndex; i <= beginIndex + 10; i++) {
+				cache.put(i + "key", i);
+			}
+			doneSignal.countDown();
+		}
+	}
+}

src/main/java/osc/git/eh3/test/TestFile.java

@@ -0,0 +1,37 @@
+package osc.git.eh3.test;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class TestFile {
+	public static void main(String[] args) {
+		File file = new File("C:\\Users\\lixiangrong\\Desktop\\20160628\\161845");
+		BufferedReader reader = null;
+		try {
+
+			reader = new BufferedReader(new FileReader(file));
+			String tempString = null;
+			while ((tempString = reader.readLine()) != null) {
+				String[] tempArr = tempString.split("\\|");
+				long time = Long.parseLong(tempArr[0]);
+				long rang = 1467100800000L;
+				if (time < rang) {
+					System.out.println(tempString);
+				}
+			}
+			reader.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			if (reader != null) {
+				try {
+					reader.close();
+				} catch (IOException e1) {
+				}
+			}
+		}
+
+	}
+}