作者:用户d4k2wd8en1 | 来源:互联网 | 2023-06-08 16:46
windows7
,当内存不足时清理掉,这样就保证了使用缓存的同时,不会耗尽内存。
byte[] data = new byte[1*1024*1024];
ReferenceQueue referenceQueue = new ReferenceQueue<>();
SoftReference softReference = new SoftReference<>(data,referenceQueue);
data = null;
System.out.println("before:"+softReference.get());
try {
for (int i = 0; i < 10; i++) {
byte[] temp = new byte[3*1024*1024];
System.out.println("processing:"+softReference.get());
}
} catch (Throwable t) {
System.out.println("after:"+softReference.get());
t.printStackTrace();
}
while(referenceQueue.poll()!=null){
System.out.println("self:"+softReference);
softReference.clear();
softReference = null;
System.out.println("last:"+softReference);
}
VM options:-Xms5m -Xmx5m -XX:+PrintGC