JShell是一个 Java Shell 工具，用于执行简单的 java 语句，例如类、方法、接口、枚举等。对其进行评估，并将结果打印在命令行提示符。
Java 改进了Process API来管理和控制操作系统进程。ProcessHandle接口识别并提供对本机进程的控制、检查进程活动性和销毁进程的方法过程。ProcessHandle.Info接口提供进程的信息快照。
在下面的代码片段中，我们可以打印pid进程API信息、子进程、和销毁进程/strong>.inJShell工具。
jshell> ProcessHandle currentProcess = ProcessHandle.current(); currentProcess ==> 3960 jshell> System.out.println("Current Process Id: = " + currentProcess.pid()); Current Process Id: = 3960 jshell> currentProcess.info(); $3 ==> [user: Optional[Tutorialspoint\User], cmd: C:\Program Files\Java\jdk-9.0.4\bin\java.exe, startTime: Optional[2020-05-03T06:43:37.510Z], totalTime: Optional[PT1.265625S]] jshell> currentProcess.pid(); $4 ==> 3960 jshell> ProcessHandle.of(3960) $5 ==> Optional[3960] jshell> $5.get() $6 ==> 3960 jshell> $6.info() $7 ==> [user: Optional[Tutorialspoint\User], cmd: C:\Program Files\Java\jdk-9.0.4\bin\java.exe, startTime: Optional[2020-05-03T06:43:37.510Z], totalTime: Optional[PT1.390625S]] jshell> Stream childProc = ProcessHandle.current().children(); childProc ==> java.util.stream.ReferencePipeline$2@6895a785 jshell> childProc.count() $10 ==> 1 jshell> childProc.forEach(procHandle -> { System.out.println(procHandle.destroy() ? "Could not kill process " + procHandle.pid() : "Terminated " + procHandle.pid()); }); | java.lang.IllegalStateException thrown: stream has already been operated upon or closed | at AbstractPipeline.evaluate (AbstractPipeline.java:229) | at ReferencePipeline.forEach (ReferencePipeline.java:430) | at (#11:1)
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