Java Utililty Methods Memory Usage

List of utility methods to do Memory Usage

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Description

The list of methods to do Memory Usage are organized into topic(s).

Method

StringmemoryUsage()
Calculates the memory usage according to Runtime. 
final Runtime runtime = Runtime.getRuntime();
runtime.gc();
final long max = runtime.maxMemory();
final long total = runtime.totalMemory();
final long free = runtime.freeMemory();
final long used = total - free;
return String.format("%d\t%d\t%d\t%d", max, total, free, used);
StringmemoryUsage()
memory Usage 
final StringBuffer buf = new StringBuffer(80);
buf.append("(used:").append(usedMemorym());
buf.append("M/").append(freeMemorym());
buf.append("M [").append(totalMemorym());
buf.append("M,").append(maxMemorym());
buf.append("M ])");
return buf.toString();
voidprintMemoryUsage()
print Memory Usage 
System.out.println(getMemoryUsageHr());
StringreportMemoryUsage()
report Memory Usage 
Runtime r = Runtime.getRuntime();
return String.valueOf((r.totalMemory() - r.freeMemory()) / (1024 * 1024)) + " MB";
voidshowMemoryUsage()
show Memory Usage 
Runtime runtime = Runtime.getRuntime();
long maxMemory = runtime.maxMemory();
long allocatedMemory = runtime.totalMemory();
long freeMemory = runtime.freeMemory();
System.out.println("-- MEMORY USAGE -----------------");
System.out.println("-- free memory: " + freeMemory / 1024);
System.out.println("-- allocated memory: " + allocatedMemory / 1024);
System.out.println("-- max memory: " + maxMemory / 1024);
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