8355578: [java.net] Use @requires tag instead of exiting based on "os.name" property value

test/jdk/java/net/Inet4Address/PingThis.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,27 +27,20 @@
 
 /* @test
  * @bug 7163874 8133015
+ * @summary InetAddress.isReachable is returning false for InetAdress 0.0.0.0 and ::0
+ * @requires os.family != "windows"
  * @library /test/lib
- * @summary InetAddress.isReachable is returning false
- *          for InetAdress 0.0.0.0 and ::0
  * @run main PingThis
  * @run main/othervm -Djava.net.preferIPv4Stack=true PingThis
  */
 
-import java.net.Inet6Address;
 import java.net.InetAddress;
-import java.net.NetworkInterface;
 import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Iterator;
 import java.util.List;
 import jdk.test.lib.net.IPSupport;
 
 public class PingThis {
     public static void main(String args[]) throws Exception {
-        if (System.getProperty("os.name").startsWith("Windows")) {
-            return;
-        }
         IPSupport.throwSkippedExceptionIfNonOperational();
 
         List<String> addrs = new ArrayList<String>();

test/jdk/java/net/MulticastSocket/NoLoopbackPackets.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,29 +24,20 @@
 /*
  * @test
  * @bug 4742177
- * @library /test/lib
  * @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code
+ * @requires os.family != "windows"
+ * @library /test/lib
  */
 import java.util.*;
 import java.net.*;
 import jdk.test.lib.NetworkConfiguration;
 import jdk.test.lib.net.IPSupport;
 
 public class NoLoopbackPackets {
-    private static String osname;
-
-    static boolean isWindows() {
-        if (osname == null)
-            osname = System.getProperty("os.name");
-        return osname.contains("Windows");
-    }
 
     private static final String MESSAGE = "hello world (" + System.nanoTime() + ")";
+
     public static void main(String[] args) throws Exception {
-        if (isWindows()) {
-            System.out.println("The test only run on non-Windows OS. Bye.");
-            return;
-        }
 
         MulticastSocket msock = null;
         List<SocketAddress> failedGroups = new ArrayList<SocketAddress>();

test/jdk/java/net/MulticastSocket/PromiscuousIPv6.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,7 +24,9 @@
 /*
  * @test
  * @bug 8215294
- * @requires os.family == "linux"
+ * @requires os.family == "linux" & !(os.version ~= "3\\.10\\.0.*")
+ * @comment This test should only be run on Linux.
+ *          The behavior under test is known NOT to work on Linux 3.10.0* kernels.
  * @library /test/lib
  * @build jdk.test.lib.NetworkConfiguration
  *        PromiscuousIPv6
@@ -148,18 +150,6 @@ static void test(NetworkInterface nif, InetAddress group1, InetAddress group2)
     }
 
     public static void main(String args[]) throws IOException {
-        String os = System.getProperty("os.name");
-
-        if (!os.equals("Linux")) {
-            throw new SkippedException("This test should be run only on Linux");
-        } else {
-            String osVersion = System.getProperty("os.version");
-            String prefix = "3.10.0";
-            if (osVersion.startsWith(prefix)) {
-                throw new SkippedException(
-                        String.format("The behavior under test is known NOT to work on '%s' kernels", prefix));
-            }
-        }
 
         NetworkConfiguration.printSystemConfiguration(System.out);
         List<NetworkInterface> nifs = NetworkConfiguration.probe()

test/jdk/java/net/MulticastSocket/SetOutgoingIf.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,10 +24,11 @@
 /*
  * @test
  * @bug 4742177 8241786
+ * @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code
+ * @requires os.family != "windows"
  * @library /test/lib
  * @run main/othervm SetOutgoingIf
  * @run main/othervm -Djdk.net.usePlainDatagramSocketImpl SetOutgoingIf
- * @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code
  */
 import java.io.IOException;
 import java.net.*;
@@ -37,7 +38,7 @@
 
 
 public class SetOutgoingIf implements AutoCloseable {
-    private static String osname;
+
     private final MulticastSocket SOCKET;
     private final int PORT;
     private final Map<NetIf, MulticastSender> sendersMap = new ConcurrentHashMap<>();
@@ -50,12 +51,6 @@ private SetOutgoingIf() {
         }
     }
 
-    static boolean isWindows() {
-        if (osname == null)
-            osname = System.getProperty("os.name");
-        return osname.contains("Windows");
-    }
-
     static boolean isMacOS() {
         return System.getProperty("os.name").contains("OS X");
     }
@@ -83,10 +78,6 @@ public void close() {
     }
 
     public void run() throws Exception {
-        if (isWindows()) {
-            System.out.println("The test only run on non-Windows OS. Bye.");
-            return;
-        }
 
         if (!hasIPv6()) {
             System.out.println("No IPv6 available. Bye.");

test/jdk/java/net/ServerSocket/AnotherSelectFdsLimit.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,6 +25,7 @@
  * @test
  * @bug 8035897
  * @summary FD_SETSIZE should be set on macosx
+ * @requires os.family == "mac"
  * @run main/othervm AnotherSelectFdsLimit 1023
  * @run main/othervm AnotherSelectFdsLimit 1024
  * @run main/othervm AnotherSelectFdsLimit 1025
@@ -41,10 +42,6 @@ public class AnotherSelectFdsLimit {
     static final int DEFAULT_FDS_TO_USE = 1600;
 
     public static void main(String [] args) throws Exception {
-        if (!System.getProperty("os.name").contains("OS X")) {
-            System.out.println("Test only run on MAC. Exiting.");
-            return;
-        }
 
         int fdsToUse = DEFAULT_FDS_TO_USE;
         if (args.length == 1)

test/jdk/java/net/ServerSocket/SelectFdsLimit.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,7 @@
  * @summary The total number of file descriptors is limited to
  * 1024(FDSET_SIZE) on MacOSX (the size of fd array passed to select()
  * call in java.net classes is limited to this value).
+ * @requires os.family == "mac"
  * @run main/othervm SelectFdsLimit
  * @author [email protected]
  */
@@ -35,7 +36,6 @@
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.net.ServerSocket;
 import java.net.SocketTimeoutException;
 
@@ -72,12 +72,6 @@ static void openFiles(int fn, File f) throws FileNotFoundException, IOException
 
     public static void main(String [] args) throws IOException, FileNotFoundException {
 
-        //The bug 8021820 is a Mac specific and because of that test will pass on all
-        //other platforms
-        if (!System.getProperty("os.name").contains("OS X")) {
-           return;
-        }
-
         //Create test directory with test files
         prepareTestEnv();