public class T
{
public static void main(String[] args) throws Exception
{
// 創(chuàng)建 1000 個 String
String strA[] = new String[1000];
long start = 0;
long end = 0;
// 先垃圾回收
System.gc();
start = Runtime.getRuntime().freeMemory();
for (int i = 0; i < 1000; i ++)
strA[i] = new String();
// 快要計算的時,再清理一次
System.gc();
end = Runtime.getRuntime().freeMemory();
System.out.println("一個String對象占內存:" + (start - end)/1000.0);
}
}