java 单例模式的常用的两种创建方式_java单例类怎么构建

方式一 （私有静态内部类）

/**
 * @desc java  singleton class generate by private static  internal class
 */
public class HookManagerHandler {

    private HookManagerHandler() {
    }

    private static class MangerHandler {
        private static HookManagerHandler hookManagerHandler = new HookManagerHandler();
    }

    public static HookManagerHandler getInstance() {
        return MangerHandler.hookManagerHandler;
    }
}

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方式二（私有静态成员变量）

/**
 * @desc a variable static final
 */
public final class HookManager {
    private static final HookManager HMG = new HookManager();

    public static HookManager get() {
        return HMG;
    }

}
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