Memory Analyzer

MemoryAnalyzer

import java.io.PrintWriter;

public class MemoryStatistics {

    private static final int MB      = 1024 * 1024;

    private static Runtime   runtime = Runtime.getRuntime();

    public static long getUsedMemory() {
        return (runtime.totalMemory() - runtime.freeMemory()) / MB;
    }

    public static long getFreeMemory() {
        return runtime.freeMemory() / MB;
    }

    public static long getMaxAvailableMemory() {
        return runtime.maxMemory() / MB;
    }

    public static long getAvailableMemory() {
        return runtime.totalMemory() / MB;
    }

    public static void printMemoryUsage(final PrintWriter writer) {
        writer.write(usageAsString());
    }

    private static String usageAsString() {
        StringBuilder buffer = new StringBuilder();
        buffer
                .append("Used: ")
                .append(getUsedMemory())
                .append(" Free: ")
                .append(getFreeMemory())
                .append(" Available: ")
                .append(getAvailableMemory())
                .append(" MaxAvailable ")
                .append(getMaxAvailableMemory());
        return buffer.toString();
    }

}