我知道如何通過它的引用變量設置爲空留下一個信號垃圾收集器刪除對象: Player player_reference = new Player();
player_reference = null;
// Now the Garbage collector knows to release all the memory related to this object.
但我怎麼能設置參考變量通
我想運行一個簡單的代碼,其中前幾行是 **System.out.println("Enter the number of nodes\n");
BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
int n = bufferRead.read();
Sys