单例 java.lang.ExceptionInInitializerError
时间: 2023-10-19 10:31:12 浏览: 52
单例模式是一种设计模式,它保证一个类只有一个实例,并提供了一个全局访问点。而java.lang.ExceptionInInitializerError是一种异常,它表示在静态初始化期间发生了错误。在引用的示例中,当调用Example.getInstance()方法时,会触发类的加载,但是在加载过程中,由于初始化顺序不正确,导致出现了ExceptionInInitializerError异常。具体地说,当为静态变量test赋值时,需要调用构造方法Example(),而在构造方法中又引用了静态变量test,此时静态变量test还未赋值,因此出现了异常。因此,要解决这个问题,需要确保在调用构造方法时,静态变量已经被正确初始化。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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