朋友, 你對java很熟嗎? 來看看下面這段代碼, 心里運行一次, 看看它的執行結果是什么? class Singleton { PRivate static Singleton obj = new Singleton(); public static int counter1; public static int counter2 = 0;
private Singleton() { counter1++; counter2++; }
public static Singleton getInstance() { return obj; } }
// 程序2 public class MyMain { public static void main(String[] args) { Singleton obj = Singleton.getInstance(); System.out.println("obj.counter1=="+obj.counter1); System.out.println("obj.counter2=="+obj.counter2); } } 想出來結果了嗎? 那你把這段程序編譯運行一下, 看看是不是你想的答案?
