e088. listing all system properties.txt

这里面包含了一百多个JAVA源文件

// Get all system properties
    Properties props = System.getProperties();
    
    // Enumerate all system properties
    Enumeration enum = props.propertyNames();
    for (; enum.hasMoreElements(); ) {
        // Get property name
        String propName = (String)enum.nextElement();
    
        // Get property value
        String propValue = (String)props.get(propName);
    }