How to use hashCode method of com.sun.tools.attach.VirtualMachineDescriptor class

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...131 }132 /​**133 * Returns a hash-code value for this VirtualMachineDescriptor. The hash134 * code is based upon the descriptor's components, and satifies135 * the general contract of the {@link java.lang.Object#hashCode()136 * Object.hashCode} method.137 *138 * @return A hash-code value for this descriptor.139 */​140 public int hashCode() {141 if (hash != 0) {142 return hash;143 }144 hash = provider.hashCode() * 127 + id.hashCode();145 return hash;146 }147 /​**148 * Tests this VirtualMachineDescriptor for equality with another object.149 *150 * <p> If the given object is not a VirtualMachineDescriptor then this151 * method returns <tt>false</​tt>. For two VirtualMachineDescriptors to152 * be considered equal requires that they both reference the same153 * provider, and their {@link #id() identifiers} are equal. </​p>154 *155 * <p> This method satisfies the general contract of the {@link156 * java.lang.Object#equals(Object) Object.equals} method. </​p>157 *158 * @param ob The object to which this object is to be compared...

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1import com.sun.tools.attach.VirtualMachine;2import com.sun.tools.attach.VirtualMachineDescriptor;3import java.util.List;4public class Main {5 public static void main(String[] args) {6 List<VirtualMachineDescriptor> vms = VirtualMachine.list();7 for (VirtualMachineDescriptor vmd : vms) {8 System.out.println(vmd.id() + " " + vmd.displayName());9 }10 }11}

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hashCode

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1import com.sun.tools.attach.VirtualMachineDescriptor;2import java.util.List;3import java.util.Map;4import java.util.HashMap;5import java.util.Iterator;6import java.util.Set;7import java.util.HashSet;8import java.util.ArrayList;9import java.util.Collections;10import java.util.Comparator;11import java.util.Arrays;12import java.util.stream.Collectors;13import java.util.stream.Stream;14import java.util.stream.StreamSupport;15import java.util.stream.IntStream;16import java.util.stream.DoubleStream;17import java.util.stream.LongStream;18import java.util.stream.IntStream;19import java.util.stream.DoubleStream;20import java.util.stream.LongStream;21import java.util.stream.IntStream;22import java.util.stream.DoubleStream;23import java.util.stream.LongStream;24import java.util.stream.IntStream;25import java.util.stream.DoubleStream;26import java.util.stream.LongStream;27import java.util.stream.IntStream;28import java.util.stream.DoubleStream;29import java.util.stream.LongStream;30import java.util.stream.IntStream;31import java.util.stream.DoubleStream;32import java.util.stream.LongStream;33import java.util.stream.IntStream;34import java.util.stream.DoubleStream;35import java.util.stream.LongStream;36import java.util.stream.IntStream;37import java.util.stream.DoubleStream;38import java.util.stream.LongStream;39import java.util.stream.IntStream;40import java.util.stream.DoubleStream;41import java.util.stream.LongStream;42import java.util.stream.IntStream;43import java.util.stream.DoubleStream;44import java.util.stream.LongStream;45import java.util.stream.IntStream;46import java.util.stream.DoubleStream;47import java.util.stream.LongStream;48import java.util.stream.IntStream;49import java.util.stream.DoubleStream;50import java.util.stream.LongStream;51import java.util.stream.IntStream;52import java.util.stream.DoubleStream;53import java.util.stream.LongStream;54import java.util.stream.IntStream;55import java.util.stream.DoubleStream;56import java.util.stream.LongStream;57import java.util.stream.IntStream;58import java.util.stream.DoubleStream;59import java.util.stream.LongStream;60import java.util.stream.IntStream;61import java.util.stream.DoubleStream;62import java.util.stream.LongStream;63import java.util.stream.IntStream;64import java.util.stream.DoubleStream;65import java.util.stream.LongStream;66import java.util.stream.IntStream;67import java.util.stream.DoubleStream;68import java.util.stream.LongStream;69import java.util.stream.IntStream;70import java.util.stream.DoubleStream;71import java.util.stream.LongStream;72import java.util.stream.IntStream;73import java.util.stream.DoubleStream;74import java.util.stream.LongStream;

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hashCode

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1import com.sun.tools.attach.VirtualMachine2import com.sun.tools.attach.VirtualMachineDescriptor3import java.util.stream.Collectors4import java.util.stream.Stream5def vms = Stream.of(VirtualMachine.list()).collect(Collectors.toList())6vms.each { vm ->7 println(vm.id)8 println(vm.displayName)9 println(vm.provider)10 println(vm.toString())11 println(vm.hashCode())12}

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hashCode

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1import java.util.List;2import com.sun.tools.attach.VirtualMachineDescriptor;3public class GetPID {4 public static void main(String[] args) {5 List<VirtualMachineDescriptor> vms = VirtualMachineDescriptor.list();6 for (VirtualMachineDescriptor vm : vms) {7 if (vm.displayName().contains("MyApp")) {8 System.out.println(vm.id());9 }10 }11 }12}

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hashCode

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1import java.io.IOException;2import java.util.List;3import com.sun.tools.attach.VirtualMachine;4import com.sun.tools.attach.VirtualMachineDescriptor;5public class GetPID {6 public static void main(String[] args) throws IOException {7 List<VirtualMachineDescriptor> vmList = VirtualMachine.list();8 for (VirtualMachineDescriptor vmd : vmList) {9 if (vmd.displayName().contains("java")) {10 System.out.println(vmd.displayName() + " : " + vmd.id());11 VirtualMachine vm = VirtualMachine.attach(vmd.id());12 System.out.println(vm.getSystemProperties().get("sun.java.command"));13 vm.detach();14 }15 }16 }17}

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1import com.sun.tools.attach.VirtualMachineDescriptor;2import com.sun.tools.attach.VirtualMachine;3import java.util.List;4import java.util.Map;5import java.util.Set;6import java.util.Iterator;7import java.util.ArrayList;8import java.lang.reflect.Method;9import java.lang.reflect.Field;10import java.lang.reflect.Modifier;11import java.lang.reflect.InvocationTargetException;12import java.io.IOException;13import java.util.concurrent.TimeUnit;14import java.util.concurrent.TimeoutException;15import java.util.concurrent.Callable;16import java.util.concurrent.FutureTask;17import java.util.concurrent.ExecutorService;18import java.util.concurrent.Executors;19import java.util.concurrent.ExecutionException;20import java.util.concurrent.Future;21import java.util.concurrent.CancellationException;22import java.util.concurrent.TimeoutException;23import java.util.concurrent.Callable;24import java.util.concurrent.FutureTask;25import java.util.concurrent.ExecutorService;26import java.util.concurrent.Executors;27import java.util.concurrent.ExecutionException;28import java.util.concurrent.Future;29import java.util.concurrent.CancellationException;30import java.util.concurrent.TimeoutException;31import java.util.concurrent.Callable;32import java.util.concurrent.FutureTask;33import java.util.concurrent.ExecutorService;34import java.util.concurrent.Executors;35import java.util.concurrent.ExecutionException;36import java.util.concurrent.Future;37import java.util.concurrent.CancellationException;38import java.util.concurrent.TimeoutException;39import java.util.concurrent.Callable;40import java.util.concurrent.FutureTask;41import java.util.concurrent.ExecutorService;42import java.util.concurrent.Executors;43import java.util.concurrent.ExecutionException;44import java.util.concurrent.Future;45import java.util.concurrent.CancellationException;46import java.util.concurrent.TimeoutException;47import java.util.concurrent.Callable;48import java.util.concurrent.FutureTask;49import java.util.concurrent.ExecutorService;50import java.util.concurrent.Executors;51import java.util.concurrent.ExecutionException;52import java.util.concurrent.Future;53import java.util.concurrent.CancellationException;54import java.util.concurrent.TimeoutException;55import java.util.concurrent.Callable;56import java.util.concurrent.FutureTask;57import java.util.concurrent.ExecutorService;58import java.util.concurrent.Executors;59import java.util.concurrent.ExecutionException;60import java.util.concurrent.Future;61import java.util.concurrent.CancellationException;62import java.util.concurrent.TimeoutException;63import java.util.concurrent.Callable;64import java.util.concurrent.FutureTask;65import java.util.concurrent.ExecutorService;66import java.util.concurrent.Executors;67import java.util.concurrent.ExecutionException;68import java.util.concurrent.Future;69import java.util.concurrent.CancellationException;70import java.util.concurrent.TimeoutException;71import java.util.concurrent.Callable;72import

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hashCode

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1import com.sun.tools.attach.VirtualMachineDescriptor;2import java.lang.reflect.Field;3import java.lang.reflect.Method;4import java.util.List;5import com.sun.tools.attach.VirtualMachine;6import java.util.ArrayList;7import java.util.Arrays;8import java.util.HashMap;9import java.util.Map;10public class JStackDump {11 public static void main(String[] args) throws Exception {12 List<VirtualMachineDescriptor> vmlist = VirtualMachine.list();13 System.out.println("List of JVMs:");14 for (VirtualMachineDescriptor vmd : vmlist) {15 System.out.println(vmd.displayName());16 }17 System.out.println("Enter the process id to take dump:");18 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));19 String pid = br.readLine();20 VirtualMachine vm = null;21 try {22 for (VirtualMachineDescriptor vmd : vmlist) {23 if (vmd.id().equals(pid)) {24 vm = VirtualMachine.attach(vmd);25 break;26 }27 }28 String dump = vm.getSystemProperties().getProperty("java.io.tmpdir") + File.separator + "dump.hprof";29 vm.dumpHeap(dump);30 System.out.println("Heap dump generated at " + dump);31 } catch (Exception e) {32 e.printStackTrace();33 } finally {34 if (vm != null) {35 vm.detach();36 }37 }38 }39}

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1import java.util.*;2import com.sun.tools.attach.*;3public class VirtualMachineDescriptorExample {4 public static void main(String args[]) {5 List<VirtualMachineDescriptor> list = VirtualMachine.list();6 for (VirtualMachineDescriptor vmd : list) {7 System.out.println(vmd.displayName() + " " + vmd.id());8 }9 }10}

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1import java.util.*;2import com.sun.tools.attach.*;3public class GetJavaHome {4 public static void main(String[] args) throws Exception {5 List<VirtualMachineDescriptor> vmdList = VirtualMachine.list();6 VirtualMachineDescriptor vmd = null;7 for (VirtualMachineDescriptor v : vmdList) {8 if (v.id().equals(args[0])) {9 vmd = v;10 break;11 }12 }13 if (vmd == null) {14 throw new RuntimeException("No running process found with vmid: " + args[0]);15 }16 VirtualMachine vm = VirtualMachine.attach(vmd);17 Properties props = vm.getSystemProperties();18 System.out.println(props.getProperty("java.home"));19 }20}

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