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VM arguments(VM options)란 JVM에 전달되어 VM의 동작방식 및 시스템 속성을 정의합니다.

  • X 옵션 : JVM Heap Memory, Permanent Generation , Direct Buffer 크기 지정 등
  • D 옵션 : 전역 시스템 속성 정의
    • -DKey = Value
    • 단건조회 : System.getPropertie(String key)
    • 전체조회 : System.getProperties()

VM arguments 추가 - Eclipse

Servers > open launch configuration > Edit Configuration > VM arguments에 원하는 항목 추가

VM options 추가 - IntelliJ

Run/Debug Configurations > 어플리케이션 선택 > Add VM options 메뉴를 활성화 한 뒤 원하는 항목을 추가해주세요.

VM arguments(VM options) 조회

System.getPropertie(String key) / System.getProperties() 를 사용하여 Java 어플리케이션 안에서 시스템 변수(VM argument)들을 조회 할 수 있습니다. 

public static void main(String[] args){

	// Propertie 단건 조회
	System.out.println("============= Propertie 단건 조회 ================");
	System.out.println("ifuwanna.property="+ System.getProperty("ifuwanna.property"));

	// Propertie 전체 조회
	System.out.println("============= Propertie 전체 조회 ================");
	Properties props = System.getProperties();
	for (Object propKey : System.getProperties().keySet()) {
		String key = (String) propKey;
		String value = props.getProperty(key);
		System.out.println(key + "=" + value);
	}

}
============= Propertie 단건 조회 ================
ifuwanna.property=test
============= Propertie 전체 조회 ================
ifuwanna.property=test
java.runtime.name=Java(TM) SE Runtime Environment
sun.boot.library.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib
java.vm.version=25.172-b11
gopherProxySet=false
java.vm.vendor=Oracle Corporation
java.vendor.url=http://java.oracle.com/
path.separator=:
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
file.encoding.pkg=sun.io
user.country=KR
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=unknown
java.vm.specification.name=Java Virtual Machine Specification
user.dir=/Users/cjos/IdeaProjects/Algorithm
java.runtime.version=1.8.0_172-b11
java.awt.graphicsenv=sun.awt.CGraphicsEnvironment
java.endorsed.dirs=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/endorsed
os.arch=x86_64
java.io.tmpdir=/var/folders/2n/b3skq8k90rvg2n34th3cgk8m0000gn/T/
line.separator=

java.vm.specification.vendor=Oracle Corporation
os.name=Mac OS X
sun.jnu.encoding=UTF-8
java.library.path=/Users/cjos/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
java.specification.name=Java Platform API Specification
java.class.version=52.0
sun.management.compiler=HotSpot 64-Bit Tiered Compilers
os.version=10.15.7
http.nonProxyHosts=lx.astxsvc.com|*.lx.astxsvc.com
user.home=/Users/cjos
user.timezone=
java.awt.printerjob=sun.lwawt.macosx.CPrinterJob
file.encoding=UTF-8
java.specification.version=1.8
java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/lib/tools.jar:/Users/cjos/IdeaProjects/Algorithm/target/classes:/Users/cjos/.m2/repository/org/junit/jupiter/junit-jupiter/5.8.2/junit-jupiter-5.8.2.jar:/Users/cjos/.m2/repository/org/junit/jupiter/junit-jupiter-api/5.8.2/junit-jupiter-api-5.8.2.jar:/Users/cjos/.m2/repository/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar:/Users/cjos/.m2/repository/org/junit/platform/junit-platform-commons/1.8.2/junit-platform-commons-1.8.2.jar:/Users/cjos/.m2/repository/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar:/Users/cjos/.m2/repository/org/junit/jupiter/junit-jupiter-params/5.8.2/junit-jupiter-params-5.8.2.jar:/Users/cjos/.m2/repository/org/junit/jupiter/junit-jupiter-engine/5.8.2/junit-jupiter-engine-5.8.2.jar:/Users/cjos/.m2/repository/org/junit/platform/junit-platform-engine/1.8.2/junit-platform-engine-1.8.2.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar
user.name=cjos
java.vm.specification.version=1.8
sun.java.command=AlgorithmMain
java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre
sun.arch.data.model=64
user.language=ko
java.specification.vendor=Oracle Corporation
awt.toolkit=sun.lwawt.macosx.LWCToolkit
java.vm.info=mixed mode
java.version=1.8.0_172
java.ext.dirs=/Users/cjos/Library/Java/Extensions:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/ext:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
sun.boot.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/jre/classes
java.vendor=Oracle Corporation
file.separator=/
java.vendor.url.bug=http://bugreport.sun.com/bugreport/
sun.io.unicode.encoding=UnicodeBig
sun.cpu.endian=little
socksNonProxyHosts=lx.astxsvc.com|*.lx.astxsvc.com
ftp.nonProxyHosts=lx.astxsvc.com|*.lx.astxsvc.com
sun.cpu.isalist=

Process finished with exit code 0

 

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