Example usage for java.lang System setIn

Introduction

In this page you can find the example usage for java.lang System setIn.

Prototype

public static void setIn(InputStream in) 

Source Link

Document

Reassigns the "standard" input stream.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    System.setIn(new FileInputStream("file.txt"));

    char ret = (char) System.in.read();

    System.out.println(ret);//  w  w w . java 2  s. c  o  m
}

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From source file:Main.java

public static void main(String[] args) {
    String str = "java2s.com";
    ByteArrayInputStream bais = new ByteArrayInputStream(str.getBytes());
    System.setIn(bais);

    Scanner scanner = new Scanner(System.in);
    String input = scanner.next();
    System.out.println(input);//from  ww  w  .  j ava2 s.  c  om
}

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From source file:MainClass.java

public static void main(String[] args) throws IOException {
    PrintStream console = System.out;
    BufferedInputStream in = new BufferedInputStream(new FileInputStream("Redirecting.java"));
    PrintStream out = new PrintStream(new BufferedOutputStream(new FileOutputStream("test.out")));
    System.setIn(in);
    System.setOut(out);/*from w w w.  j  a va 2 s. c  o m*/
    System.setErr(out);
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String s;
    while ((s = br.readLine()) != null)
        System.out.println(s);
    out.close();
    System.setOut(console);
}

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From source file:Redirect.java

public static void main(String args[]) throws Exception {
    PrintStream origOut = System.out;
    PrintStream origErr = System.err;

    InputStream stdin = null;//from w w w . j a v a  2 s .  c  o m
    stdin = new FileInputStream("Redirect.in");
    PrintStream stdout = null;
    stdout = new PrintStream(new FileOutputStream("Redirect.out"));
    PrintStream stderr = null;
    stderr = new PrintStream(new FileOutputStream("Redirect.err"));
    origOut.println("1");
    System.out.println("2");
    origOut.println("3");
    System.err.println("4");
    origErr.println("5");

    System.setIn(stdin);
    System.setOut(stdout);
    System.setErr(stderr);

    origOut.println("\nR");
    System.out.println("T");
    origOut.println("Tq");
    System.err.println("Tqw");
    origErr.println("Test");

    origOut.println("\nRedirect:  Round #3");
    int inChar = 0;
    while (-1 != inChar) {
        try {
            inChar = System.in.read();
        } catch (Exception e) {
            // Clean up the output and bail.
            origOut.print("\n");
            break;
        }
        origOut.write(inChar);
    }

    stdin.close();
    stdout.close();
    stderr.close();

    System.exit(0);
}

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From source file:Redirecting.java

public static void main(String[] args) throws IOException {
    PrintStream console = System.out;
    BufferedInputStream in = new BufferedInputStream(new FileInputStream("Redirecting.java"));
    PrintStream out = new PrintStream(new BufferedOutputStream(new FileOutputStream("test.out")));
    System.setIn(in);
    System.setOut(out);/*from   w  w w .j  a  v a2s.co  m*/
    System.setErr(out);
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String s;
    while ((s = br.readLine()) != null)
        System.out.println(s);
    out.close(); // Remember this!
    System.setOut(console);
}

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From source file:com.github.robozonky.cli.GoogleCredentialsFeatureTest.java

@BeforeEach
void replaceSystemIn() {
    System.setIn(IOUtils.toInputStream("", Defaults.CHARSET));
}

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From source file:com.github.robozonky.cli.GoogleCredentialsFeatureTest.java

@AfterEach
void restoreSystemIn() {
    System.setIn(originalSystemIn);
}

---

From source file:MyTest.java

@Test
public void test() throws Exception {
    InputStream input = null;//from  w  ww.j a  v a  2 s  .c o m
    InputStream expectedOutput = null;
    int i = 0;
    do {
        input = Thread.currentThread().getContextClassLoader().getResourceAsStream("input" + String.valueOf(i));
        expectedOutput = Thread.currentThread().getContextClassLoader()
                .getResourceAsStream("output" + String.valueOf(i));

        if (input != null) {
            System.out.println("Running case #" + String.valueOf(i) + " input:");
            System.out.println(IOUtils.toString(Thread.currentThread().getContextClassLoader()
                    .getResourceAsStream("input" + String.valueOf(i)), "US-ASCII"));
            System.setIn(input);
            if (expectedOutput != null) {
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                PrintStream realOutput = new PrintStream(byteArrayOutputStream);
                PrintStream preservedOut = System.out;
                System.setOut(realOutput);
                long start = System.currentTimeMillis();
                MySolution.main(null);
                long end = System.currentTimeMillis();
                System.setOut(preservedOut);
                System.out.println("Output:");
                System.out.println(byteArrayOutputStream.toString("US-ASCII"));
                System.out.println("Time: " + (end - start));
                assertEquals(IOUtils.toString(expectedOutput, "US-ASCII"),
                        byteArrayOutputStream.toString("US-ASCII"));
            } else {
                MySolution.main(null);
            }
        }
        i++;
    } while (input != null);
}

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From source file:net.jperf.LogParserTest.java

public void testLogParserMain() throws Exception {
    PrintStream realOut = System.out;
    ByteArrayOutputStream fakeOut = new ByteArrayOutputStream();
    System.setOut(new PrintStream(fakeOut, true));
    try {/*from   w  ww . j  a v  a  2s  .c  om*/
        //usage
        realOut.println("-- Usage Test --");
        LogParser.runMain(new String[] { "--help" });
        realOut.println(fakeOut.toString());
        assertTrue(fakeOut.toString().indexOf("Usage") >= 0);
        fakeOut.reset();

        //log on std in, write to std out
        InputStream realIn = System.in;
        ByteArrayInputStream fakeIn = new ByteArrayInputStream(testLog.getBytes());
        System.setIn(fakeIn);
        try {
            realOut.println("-- Std in -> Std out Test --");
            LogParser.runMain(new String[0]);
            realOut.println(fakeOut.toString());
            assertTrue(fakeOut.toString().indexOf("tag") >= 0 && fakeOut.toString().indexOf("tag2") >= 0
                    && fakeOut.toString().indexOf("tag3") >= 0);
            fakeOut.reset();
        } finally {
            System.setIn(realIn);
        }

        //Log from a file
        FileUtils.writeStringToFile(new File("./target/logParserTest.log"), testLog);

        //log from file, write to std out
        realOut.println("-- File in -> Std out Test --");
        LogParser.runMain(new String[] { "./target/logParserTest.log" });
        realOut.println(fakeOut.toString());
        assertTrue(fakeOut.toString().indexOf("tag") >= 0 && fakeOut.toString().indexOf("tag2") >= 0
                && fakeOut.toString().indexOf("tag3") >= 0);
        fakeOut.reset();

        //CSV format test
        realOut.println("-- File in -> Std out Test with CSV --");
        LogParser.runMain(new String[] { "-f", "csv", "./target/logParserTest.log" });
        realOut.println(fakeOut.toString());
        assertTrue(fakeOut.toString().indexOf("\"tag\",") >= 0 && fakeOut.toString().indexOf("\"tag2\",") >= 0
                && fakeOut.toString().indexOf("\"tag3\",") >= 0);
        fakeOut.reset();

        //log from file, write to file
        realOut.println("-- File in -> File out Test --");
        LogParser.runMain(new String[] { "-o", "./target/statistics.out", "./target/logParserTest.log" });
        String statsOut = FileUtils.readFileToString(new File("./target/statistics.out"));
        realOut.println(statsOut);
        assertTrue(
                statsOut.indexOf("tag") >= 0 && statsOut.indexOf("tag2") >= 0 && statsOut.indexOf("tag3") >= 0);

        //log from file, write to file, different timeslice
        realOut.println("-- File in -> File out with different timeslice Test --");
        LogParser.runMain(new String[] { "-o", "./target/statistics.out", "--timeslice", "120000",
                "./target/logParserTest.log" });
        statsOut = FileUtils.readFileToString(new File("./target/statistics.out"));
        realOut.println(statsOut);
        assertTrue(
                statsOut.indexOf("tag") >= 0 && statsOut.indexOf("tag2") >= 0 && statsOut.indexOf("tag3") >= 0);

        //missing param test
        realOut.println("-- Missing param test --");
        assertEquals(1, LogParser.runMain(new String[] { "./target/logParserTest.log", "-o" }));

        //unknown arg test
        realOut.println("-- Unknown arg test --");
        assertEquals(1, LogParser.runMain(new String[] { "./target/logParserTest.log", "--foo" }));
        realOut.println(fakeOut);
        assertTrue(fakeOut.toString().indexOf("Unknown") >= 0);

        //graphing test
        realOut.println("-- File in -> File out with graphing --");
        LogParser.runMain(new String[] { "-o", "./target/statistics.out", "-g", "./target/perfGraphs.out",
                "./src/test/resources/net/jperf/dummyLog.txt" });
        statsOut = FileUtils.readFileToString(new File("./target/statistics.out"));
        realOut.println(statsOut);
        String graphsOut = FileUtils.readFileToString(new File("./target/perfGraphs.out"));
        realOut.println(graphsOut);
        assertTrue(graphsOut.indexOf("chtt=TPS") > 0 && graphsOut.indexOf("chtt=Mean") > 0);
    } finally {
        System.setOut(realOut);
    }
}

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From source file:edu.stanford.muse.email.VerifyEmailSetup.java

public static Pair<Boolean, String> run() {
    PrintStream savedOut = System.out;
    InputStream savedIn = System.in;

    try {/*  www  .  j a  va2  s. c  o m*/
        // Get a Properties object
        Properties props = System.getProperties();

        // Get a Session object
        Session session = Session.getInstance(props, null);
        session.setDebug(true);
        String filename = System.getProperty("java.io.tmpdir") + File.separatorChar + "verifyEmailSetup";
        PrintStream ps = new PrintStream(new FileOutputStream(filename));
        System.setOut(ps);
        System.setErr(ps);

        // Get a Store object
        Store store = null;
        store = session.getStore("imaps");
        store.connect("imap.gmail.com", 993, "checkmuse", ""); // not the real password. unfortunately, the checkmuse a/c will get blocked by google.
        //           Folder folder = store.getFolder("[Gmail]/Sent Mail");
        //           int totalMessages = folder.getMessageCount();
        // System.err.println (totalMessages + " messages!");
        ps.close();
        String contents = Util.getFileContents(filename);
        System.out.println(contents);
        return new Pair<Boolean, String>(Boolean.TRUE, contents);
    } catch (AuthenticationFailedException e) {
        /* its ok if auth failed. we only want to check if IMAPS network route is blocked.
         when network is blocked, we'll get something like
        javax.mail.MessagingException: No route to host; 
        nested exception is: 
        java.net.NoRouteToHostException: No route to host 
        ...
        */
        log.info("Verification succeeded: " + Util.stackTrace(e));
        return new Pair<Boolean, String>(Boolean.TRUE, "");
    } catch (Exception e) {
        log.warn("Verification failed: " + Util.stackTrace(e));
        return new Pair<Boolean, String>(Boolean.FALSE, e.toString()); // stack track reveals too much about our code... Util.stackTrace(e));         
    } finally {
        System.setOut(savedOut);
        System.setIn(savedIn);
    }
}

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