System.getProperty() method to obtain the complete list

System.out.println("java version number: " + System.getProperty("java.version")); // java version number
System.out.println("Java provider name: " + System.getProperty( "java.vendor")); // Java provider name
System.out.println("Java provider website:" + System.getProperty("java.vendor.url")); // Java provider website
System.out.println("jre directory:" + System.getProperty("java.home")); // Java, oh, it should be the jre directory
System.out.println("Java virtual machine specification version number:" + System.getProperty("java.vm.specification.version")); // Java virtual machine specification version number
System.out.println("Java virtual machine specification provider:" + System.getProperty("java.vm .specification.vendor")); // Java virtual machine specification provider
System.out.println("Java virtual machine specification name:" + System.getProperty("java.vm.specification.name")); // Java virtual machine specification name
System.out.println("Java virtual machine version number:" + System.getProperty("java.vm.version")); // Java virtual machine version number
System.out.println(" Java virtual machine provider: " + System.getProperty("java.vm.vendor")); // Java virtual machine provider
System.out.println("Java virtual machine name:" + System.getProperty("java .vm.name")); // Java virtual machine name
System.out.println("Java specification version number: " + System.getProperty("java.specification.version")); // Java specification version number
System.out.println("Java specification provider:" + System.getProperty("java.specification.vendor")); // Java specification provider
System.out.println("Java specification name:" + System. getProperty("java.specification.name")); // Java specification name
System.out.println("Java class version number:" + System.getProperty("java.class.version")); // Java class Version number
System.out.println("Java class path:" + System.getProperty("java.class.path")); // Java class path
System.out.println("Java lib path:" + System .getProperty("java.library.path")); // Java lib path
System.out.println("Java input and output temporary path:" + System.getProperty("java.io.tmpdir")); // Java input and output temporary path
System.out.println("Java compiler: " + System.getProperty("java.compiler")); // Java compiler
System.out.println("Java execution path: " + System.getProperty("java.ext.dirs")); // Java execution path
System.out.println("Operating system name: " + System.getProperty("os.name")); // Operating system name
System.out.println("Operating system architecture:" + System.getProperty("os.arch")); // Operating system architecture
System.out.println("Operating system version number: " + System. getProperty("os.version")); // Operating system version number
System.out.println("File separator: " + System.getProperty("file.separator")); // File separator
System. out.println("Path separator:" + System.getProperty("path.separator")); // Path separator
System.out.println("Line separator:" + System.getProperty("line.separator ")); // Line separator
System.out.println("Operating system user name: " + System.getProperty("user.name")); // User name
System.out.println("Operating system The user's home directory: " + System.getProperty("user.home")); // The user's home directory
System.out.println("The directory where the current program is located:" + System.getProperty("user.dir") ); //The directory where the current program is located

System.getProperty("catalina.home") //Tomcat installation directory