private static long[] getMemoryInfo() {
final long[] memory = new long[Type.values().length];
memory[Type.FREE.ordinal()] = Runtime.getRuntime().freeMemory();
memory[Type.TOTAL.ordinal()] = Runtime.getRuntime().totalMemory();
memory[Type.MAX.ordinal()] = Runtime.getRuntime().maxMemory();
return memory;
}
/**
* Get information about the current memory status of the JVM.
*
* @param unit used for formatting. Valid values are:
* <ul>
* <li>{@link Unit#BYTES}
* <li>{@link Unit#KILOBYTES}
* <li>{@link Unit#KIBIBYTES}
* <li>{@link Unit#MEGABYTES}
* <li>{@link Unit#MEBIBYTES}
* </ul>
* If no value is given, {@link Unit#BYTES} will be used. No decimal place will be calculated,
* plain integer values are returned.
* @return a string with the current memory information
*/
public static String getMemoryInfo(final Unit unit) {
final long[] memory = getMemoryInfo();
for (final Type type : Type.values()) {
memory[type.ordinal()] /= unit.getDenominator();
}
final StringBuilder sb = new StringBuilder(100);
sb.append("Memory (free/total/max): ");
sb.append(memory[Type.FREE.ordinal()]);
sb.append(unit.getUnitString());
sb.append("/");
sb.append(memory[Type.TOTAL.ordinal()]);
sb.append(unit.getUnitString());
sb.append("/");
sb.append(memory[Type.MAX.ordinal()]);
sb.append(unit.getUnitString());
return sb.toString();
}