Systemd (bus-all 5.5.9 API)

java.lang.Object
- org.aoju.bus.health.Systemd

```
public class Systemd
extends Object
```
System information. This is the main entry point to Oshi.
This object provides getters which instantiate the appropriate platform-specific implementations of OperatingSystem (software) and HardwareLayer (hardware).

Since:

JDK 1.8+

Version:

5.5.9

Author:

Kimi Liu

Constructor Summary

Constructors
Constructor and Description

Systemd()

Constructors
Constructor and Description
`Systemd()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`append(StringBuilder builder, String caption, Object value)` 输出到`StringBuilder`
`static void`	`dumpSystemInfo()` 将系统信息输出到`System.out`中
`static void`	`dumpSystemInfo(PrintWriter out)` 将系统信息输出到指定`PrintWriter`中
`static String`	`get(String key)` 获得System属性（调用System.getProperty）
`static String`	`get(String name, boolean quiet)` 取得系统属性,如果因为Java安全的限制而失败,则将错误打在Log中,然后返回 `null`
`static String`	`get(String name, String defaultValue)` 取得系统属性,如果因为Java安全的限制而失败,则将错误打在Log中,然后返回 `null`
`static boolean`	`getBoolean(String key, boolean defaultValue)` 获得boolean类型值
`static ClassLoadingMXBean`	`getClassLoadingMXBean()` 返回Java虚拟机类加载系统相关属性
`static CompilationMXBean`	`getCompilationMXBean()` 返回Java虚拟机编译系统相关属性如果没有编译系统,则返回`null`
`static long`	`getCurrentPID()` 获取当前进程 PID
`static Platform.OS`	`getCurrentPlatform()` Getter for the field `currentPlatformEnum`.
`static List<GarbageCollectorMXBean>`	`getGarbageCollectorMXBeans()` Returns a list of `GarbageCollectorMXBean` objects in the Java virtual machine.
`HardwareLayer`	`getHardware()` Creates a new instance of the appropriate platform-specific `HardwareLayer`.
`static NetworkParams`	`getHostInfo()` 取得Host的信息
`static long`	`getInt(String key, int defaultValue)` 获得int类型值
`static JavaInfo`	`getJavaInfo()` 取得Java Implementation的信息
`static JavaRuntime`	`getJavaRuntimeInfo()` 取得当前运行的JRE的信息
`static JavaSpecInfo`	`getJavaSpecInfo()` 取得Java Specification的信息
`static JvmInfo`	`getJvmInfo()` 取得Java Virtual Machine Implementation的信息
`static JvmSpecInfo`	`getJvmSpecInfo()` 取得Java Virtual Machine Specification的信息
`static InetAddress`	`getLocalAddress()` 取得当前主机信息
`static long`	`getLong(String key, long defaultValue)` 获得long类型值
`static List<MemoryManagerMXBean>`	`getMemoryManagerMXBeans()` Returns a list of `MemoryManagerMXBean` objects in the Java virtual machine.
`static MemoryMXBean`	`getMemoryMXBean()` 返回Java虚拟机内存系统相关属性
`static List<MemoryPoolMXBean>`	`getMemoryPoolMXBeans()` Returns a list of `MemoryPoolMXBean` objects in the Java virtual machine.
`OperatingSystem`	`getOperatingSystem()` Creates a new instance of the appropriate platform-specific `OperatingSystem`.
`static OperatingSystemMXBean`	`getOperatingSystemMXBean()` 返回Java虚拟机运行下的操作系统相关信息属性
`static OperatingSystem`	`getOsInfo()` 取得OS的信息
`static RuntimeMXBean`	`getRuntimeMXBean()` 返回Java虚拟机运行时系统相关属性
`static ThreadMXBean`	`getThreadMXBean()` 返回Java虚拟机线程系统相关属性
`static OSUser`	`getUserInfo()` 取得User的信息
`static Properties`	`props()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Systemd
```
public Systemd()
```
- Method Detail
  - getCurrentPlatform
```
public static Platform.OS getCurrentPlatform()
```
    Getter for the field currentPlatformEnum.
    
    Returns:
    
    Returns the currentPlatformEnum.
  - get
```
public static String get(String name,
                         String defaultValue)
```
    取得系统属性,如果因为Java安全的限制而失败,则将错误打在Log中,然后返回 null
    
    Parameters:
    
    name - 属性名
    
    defaultValue - 默认值
    
    Returns:
    
    属性值或null
  - get
```
public static String get(String name,
                         boolean quiet)
```
    取得系统属性,如果因为Java安全的限制而失败,则将错误打在Log中,然后返回 null
    
    Parameters:
    
    name - 属性名
    
    quiet - 安静模式,不将出错信息打在System.err中
    
    Returns:
    
    属性值或null
  - get
```
public static String get(String key)
```
    获得System属性（调用System.getProperty）
    
    Parameters:
    
    key - 键
    
    Returns:
    
    属性值
  - getBoolean
```
public static boolean getBoolean(String key,
                                 boolean defaultValue)
```
    获得boolean类型值
    
    Parameters:
    
    key - 键
    
    defaultValue - 默认值
    
    Returns:
    
    值
  - getInt
```
public static long getInt(String key,
                          int defaultValue)
```
    获得int类型值
    
    Parameters:
    
    key - 键
    
    defaultValue - 默认值
    
    Returns:
    
    值
  - getLong
```
public static long getLong(String key,
                           long defaultValue)
```
    获得long类型值
    
    Parameters:
    
    key - 键
    
    defaultValue - 默认值
    
    Returns:
    
    值
  - props
```
public static Properties props()
```
    Returns:
    
    属性列表
  - getCurrentPID
```
public static long getCurrentPID()
```
    获取当前进程 PID
    
    Returns:
    
    当前进程 ID
  - getClassLoadingMXBean
```
public static ClassLoadingMXBean getClassLoadingMXBean()
```
    返回Java虚拟机类加载系统相关属性
    
    Returns:
    
    ClassLoadingMXBean
  - getMemoryMXBean
```
public static MemoryMXBean getMemoryMXBean()
```
    返回Java虚拟机内存系统相关属性
    
    Returns:
    
    MemoryMXBean
  - getThreadMXBean
```
public static ThreadMXBean getThreadMXBean()
```
    返回Java虚拟机线程系统相关属性
    
    Returns:
    
    ThreadMXBean
  - getRuntimeMXBean
```
public static RuntimeMXBean getRuntimeMXBean()
```
    返回Java虚拟机运行时系统相关属性
    
    Returns:
    
    RuntimeMXBean
  - getCompilationMXBean
```
public static CompilationMXBean getCompilationMXBean()
```
    返回Java虚拟机编译系统相关属性如果没有编译系统,则返回null
    
    Returns:
    
    a CompilationMXBean ,如果没有编译系统,则返回null
  - getOperatingSystemMXBean
```
public static OperatingSystemMXBean getOperatingSystemMXBean()
```
    返回Java虚拟机运行下的操作系统相关信息属性
    
    Returns:
    
    OperatingSystemMXBean
  - getMemoryPoolMXBeans
```
public static List<MemoryPoolMXBean> getMemoryPoolMXBeans()
```
    Returns a list of MemoryPoolMXBean objects in the Java virtual machine. The Java virtual machine can have first or more memory pools. It may add or remove memory pools during execution.
    
    Returns:
    
    a list of MemoryPoolMXBean objects.
  - getMemoryManagerMXBeans
```
public static List<MemoryManagerMXBean> getMemoryManagerMXBeans()
```
    Returns a list of MemoryManagerMXBean objects in the Java virtual machine. The Java virtual machine can have first or more memory managers. It may add or remove memory managers during execution.
    
    Returns:
    
    a list of MemoryManagerMXBean objects.
  - getGarbageCollectorMXBeans
```
public static List<GarbageCollectorMXBean> getGarbageCollectorMXBeans()
```
    Returns a list of GarbageCollectorMXBean objects in the Java virtual machine. The Java virtual machine may have first or more GarbageCollectorMXBean objects. It may add or remove GarbageCollectorMXBean during execution.
    
    Returns:
    
    a list of GarbageCollectorMXBean objects.
  - getJvmSpecInfo
```
public static JvmSpecInfo getJvmSpecInfo()
```
    取得Java Virtual Machine Specification的信息
    
    Returns:
    
    JvmSpecInfo对象
  - getJvmInfo
```
public static JvmInfo getJvmInfo()
```
    取得Java Virtual Machine Implementation的信息
    
    Returns:
    
    JvmInfo对象
  - getJavaSpecInfo
```
public static JavaSpecInfo getJavaSpecInfo()
```
    取得Java Specification的信息
    
    Returns:
    
    JavaSpecInfo对象
  - getJavaInfo
```
public static JavaInfo getJavaInfo()
```
    取得Java Implementation的信息
    
    Returns:
    
    JavaInfo对象
  - getJavaRuntimeInfo
```
public static JavaRuntime getJavaRuntimeInfo()
```
    取得当前运行的JRE的信息
    
    Returns:
    
    JreInfo对象
  - getOsInfo
```
public static OperatingSystem getOsInfo()
```
    取得OS的信息
    
    Returns:
    
    OsInfo对象
  - getUserInfo
```
public static OSUser getUserInfo()
```
    取得User的信息
    
    Returns:
    
    UserInfo对象
  - getHostInfo
```
public static NetworkParams getHostInfo()
```
    取得Host的信息
    
    Returns:
    
    HostInfo对象
  - dumpSystemInfo
```
public static void dumpSystemInfo()
```
    将系统信息输出到System.out中
  - dumpSystemInfo
```
public static void dumpSystemInfo(PrintWriter out)
```
    将系统信息输出到指定PrintWriter中
    
    Parameters:
    
    out - PrintWriter输出流
  - append
```
public static void append(StringBuilder builder,
                          String caption,
                          Object value)
```
    输出到StringBuilder
    
    Parameters:
    
    builder - StringBuilder对象
    
    caption - 标题
    
    value - 值
  - getLocalAddress
```
public static InetAddress getLocalAddress()
```
    取得当前主机信息
    
    Returns:
    
    主机地址信息
  - getOperatingSystem
```
public OperatingSystem getOperatingSystem()
```
    Creates a new instance of the appropriate platform-specific OperatingSystem.
    
    Returns:
    
    A new instance of OperatingSystem.
  - getHardware
```
public HardwareLayer getHardware()
```
    Creates a new instance of the appropriate platform-specific HardwareLayer.
    
    Returns:
    
    A new instance of HardwareLayer.

Class Systemd

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Systemd

Method Detail

getCurrentPlatform

get

get

get

getBoolean

getInt

getLong

props

getCurrentPID

getClassLoadingMXBean

getMemoryMXBean

getThreadMXBean

getRuntimeMXBean

getCompilationMXBean

getOperatingSystemMXBean

getMemoryPoolMXBeans

getMemoryManagerMXBeans

getGarbageCollectorMXBeans

getJvmSpecInfo

getJvmInfo

getJavaSpecInfo

getJavaInfo

getJavaRuntimeInfo

getOsInfo

getUserInfo

getHostInfo

dumpSystemInfo

dumpSystemInfo

append

getLocalAddress

getOperatingSystem

getHardware