📅  最后修改于: 2020-11-15 03:04:17             🧑  作者: Mango
java.lang.Runtime类允许应用程序与应用程序在其中运行的环境进行交互。
以下是java.lang.Runtime类的声明-
public class Runtime
extends Object
Sr.No. | Method & Description |
---|---|
1 | void addShutdownHook(Thread hook)
This method registers a new virtual-machine shutdown hook. |
2 | int availableProcessors()
This method returns the number of processors available to the Java virtual machine. |
3 | Process exec(String command)
This method executes the specified string command in a separate process. |
4 | Process exec(String[] cmdarray)
This method executes the specified command and arguments in a separate process. |
5 | Process exec(String[] cmdarray, String[] envp)
This method executes the specified command and arguments in a separate process with the specified environment. |
6 | Process exec(String[] cmdarray, String[] envp, File dir)
This method executes the specified command and arguments in a separate process with the specified environment and working directory. |
7 | Process exec(String command, String[] envp)
This method executes the specified string command in a separate process with the specified environment. |
8 | Process exec(String command, String[] envp, File dir)
This method executes the specified string command in a separate process with the specified environment and working directory. |
9 | void exit(int status)
This method terminates the currently running Java virtual machine by initiating its shutdown sequence. |
10 | long freeMemory()
This method returns the amount of free memory in the Java Virtual Machine. |
11 | void gc()
This method runs the garbage collector. |
12 | static Runtime getRuntime()
This method returns the runtime object associated with the current Java application. |
13 | void halt(int status)
This method forcibly terminates the currently running Java virtual machine. |
14 | void load(String filename)
This method loads the specified filename as a dynamic library. |
15 | void loadLibrary(String libname)
This method loads the dynamic library with the specified library name. |
16 | long maxMemory()
This method returns the maximum amount of memory that the Java virtual machine will attempt to use. |
17 | boolean removeShutdownHook(Thread hook)
This method de-registers a previously-registered virtual-machine shutdown hook. |
18 | void runFinalization()
This method runs the finalization methods of any objects pending finalization. |
19 | long totalMemory()
This method returns the total amount of memory in the Java virtual machine. |
20 | void traceInstructions(boolean on)
This method enables/disables tracing of instructions. |
21 | void traceMethodCalls(boolean on)
This method enables/disables tracing of method calls. |
此类从以下类继承方法-