How to use

checkPropertyName

method

in

java.lang.System

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}

/**
 * Returns the value of a particular system property. The {@code
 * defaultValue} will be returned if no such property has been found.
 */
public static String getProperty(String name, String defaultValue) {
  checkPropertyName(name);
  return getProperties().getProperty(name, defaultValue);
}

/**
 * Sets the value of a particular system property.
 *
 * @return the old value of the property or {@code null} if the property
 *         didn't exist.
 */
public static String setProperty(String name, String value) {
  checkPropertyName(name);
  return (String) getProperties().setProperty(name, value);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}

/**
 * Removes a specific system property.
 *
 * @return the property value or {@code null} if the property didn't exist.
 * @throws NullPointerException
 *             if the argument is {@code null}.
 * @throws IllegalArgumentException
 *             if the argument is empty.
 */
public static String clearProperty(String name) {
  checkPropertyName(name);
  return (String) getProperties().remove(name);
}