Java Utililty Methods Properties Get

void clearPrefixedSystemProperties(String prefix, Map targetPropertyMap)
clearPrefixedSystemProperties clears System Properties by writing null properties in the targetPropertyMap that match a prefix

for (Object o : System.getProperties().keySet()) {
 String propertyName = (String) o;
 if (propertyName.startsWith(prefix) && !targetPropertyMap.containsKey(propertyName)) {
 targetPropertyMap.put(propertyName, null);

void copyProperties(Hashtable src, Hashtable target)
This API copies the properties from src hashtable to the target hashtable

Enumeration keys = src.keys();
while (keys.hasMoreElements()) {
 Object key = keys.nextElement();
 Object value = src.get(key);
 target.put(key, value);

boolean getBoolean(Properties props, String key)
get Boolean

return getBoolean(props, key, false);

boolean getBoolean(Properties props, String name, boolean defaultValue)
get Boolean

if (!props.containsKey(name))
 return defaultValue;
return "true".equalsIgnoreCase(props.getProperty(name));

int getInt(Properties props, String name)
get Int

if (props.containsKey(name)) {
 return getInt(props, name, -1);
throw new IllegalArgumentException("Missing required property '" + name + "'");

int getInt(Properties props, String name, int defaultValue)
get Int

return getIntInRange(props, name, defaultValue, Integer.MIN_VALUE, Integer.MAX_VALUE);

Map getIntersectionOfPropertyValues(Properties propertyFileOne, Properties propertyFileTwo)
get Intersection Of Property Values

Map<String, String> intersection = new HashMap<String, String>();
for (String key : propertyFileOne.stringPropertyNames()) {
 String propertyOneValue = propertyFileOne.getProperty(key);
 String propertyTwoValue = propertyFileTwo.getProperty(key);
 if (propertyOneValue != null && propertyTwoValue != null && propertyOneValue.equals(propertyTwoValue)) {
 intersection.put(key, propertyOneValue);
return intersection;

int getIntInRange(Properties props, String name, int defaultValue, int min, int max)
get Int In Range

int v = defaultValue;
if (props.containsKey(name)) {
 v = Integer.valueOf(props.getProperty(name));
if (v >= min && v <= max) {
 return v;
throw new IllegalArgumentException(name + " has value " + v + " which is not in the range");
...

int getIntProperty(Properties props, String keyword, int defaultValue)
get Int Property

int rv = defaultValue;
if (props != null) {
 String s = props.getProperty(keyword);
 if (s != null) {
 s = s.trim();
 if (!s.isEmpty()) {
 try {
 rv = Integer.parseInt(s);
...

boolean getIsB37PropertyValue(final Properties dataSourceProperties)
Get if the properties has specified the `isB37` field #CONFIG_FILE_FIELD_NAME_IS_B37_DATA_SOURCE as true.

if (dataSourceProperties.containsKey(CONFIG_FILE_FIELD_NAME_IS_B37_DATA_SOURCE)) {
 return Boolean.valueOf(
 dataSourceProperties.getProperty(CONFIG_FILE_FIELD_NAME_IS_B37_DATA_SOURCE).replace(" ", ""));
return false;