public class MaxMemory{
private static String uft(){
Runtime rt = Runtime.getRuntime();
long free = rt.freeMemory(), total = rt.totalMemory(), used = total - free;
long max = rt.maxMemory();
java.text.NumberFormat nf = java.text.NumberFormat.getInstance() ;
return "used: "+nf.format(used)+" free: "+nf.format(free)+
" total: "+nf.format(total)+" max: "+nf.format(max);
}
public static void main(String[] args){
System.out.println("before we start: "+uft());
java.util.HashSet al = new java.util.HashSet(1024);
int i = 0;
byte[] barrier = new byte[2048];
while(true) try{
al.add(new byte[1024]);
i++;
} catch(OutOfMemoryError e){
barrier = null;
break;
}
System.out.println("after "+i+"k "+uft());} } // MaxMemory
When I run it I get: [EMAIL PROTECTED] ] java MaxMemory before we start: used: 318,832 free: 1,712,784 total: 2,031,616 max: 134,217,728 after 61993k used: 66,649,312 free: 800 total: 66,650,112 max: 134,217,728 [EMAIL PROTECTED] ] java -Xmx128m MaxMemory before we start: used: 318,832 free: 1,712,784 total: 2,031,616 max: 201,326,592 after 123587k used: 133,233,920 free: 768 total: 133,234,688 max: 201,326,592 [EMAIL PROTECTED] ] java -version java version "1.4.1_02" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_02-b06) Java HotSpot(TM) Client VM (build 1.4.1_02-b06, mixed mode)
---------------------------------------------------------------------- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
