Display Memory Size Before & After Garbage Collector Called

/**

* Write a program which display the remaining memory. Before and

* after Garbage collector is called.

*/

public class MemoryCheck {

public static void calculateMemory() {

try {

// creating dummy objects

for (int i = 0; i < class="SpellE">i++)

new String("dummy string");

// store the free memory size before

long lngFreeMemoryBefore = Runtime.getRuntime().freeMemory();

// run the garbage collector

System.gc();

// store the available free memory after

long lngFreeMemoryAfter = Runtime.getRuntime().freeMemory();

// display the result

System.out.println("Free Memory Before : " + lngFreeMemoryBefore);

System.out.println("Free Memory After : " + lngFreeMemoryAfter);

System.out.println("Free Memory : "

+ (lngFreeMemoryAfter - lngFreeMemoryBefore));

} catch (Exception e) {

System.out.println("Error Ocurred!!");

e.printStackTrace();

}

}

/**

* execution begin from here

*

* @param args

*/

public static void main(String[] args) {

calculateMemory();

}

}