Java之获取系统属性

import java.util.Enumeration;
import java.util.Properties;

public class Example609 {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Properties properties = System.getProperties();
        Enumeration propertiesNames = properties.propertyNames();
        while (propertiesNames.hasMoreElements()) {
            String key = (String) propertiesNames.nextElement();
            String value = System.getProperty(key);
            System.out.println(key+"->"+value);
        }

    }

}