class Chinese { private static Chinese object = new Chinese(); private Chinese() {} public static Chinese getInstance(){ return object; 7 } public class TestChinese{ public static void main(String[] args) { Chinese obj1 = Chinese.getInstance(); Chinese obj2 = Chinese.getInstance(); System.out.println(obj1 == obj2) ;

这段代码有误，应该是这样的：

class Chinese {
    private static Chinese object = new Chinese();
    private Chinese() {}
    public static Chinese getInstance() {
        return object;
    }
}

public class TestChinese {
    public static void main(String[] args) {
        Chinese obj1 = Chinese.getInstance();
        Chinese obj2 = Chinese.getInstance();
        System.out.println(obj1 == obj2);
    }
}

这段代码的输出结果是：true。

因为在 Chinese 类中，构造方法被私有化了，所以外部无法通过 new 关键字创建对象。而 getInstance() 方法返回了一个类内部创建的静态对象 object，所以 obj1 和 obj2 引用的是同一个对象。因此，obj1 == obj2 的结果为 true。

相关问题

getInstance

`getInstance` is a commonly used static method in object-oriented programming that returns a single instance of a class. This method ensures that only one instance of the class is created and it provides a global point of access to that instance.

For example, in the Singleton design pattern, `getInstance` is used to create a single instance of a class and to provide access to that instance throughout the application.

Here's an example implementation of the `getInstance` method:

public class Singleton {
  private static Singleton instance = null;
  
  private Singleton() {
    // private constructor to prevent instantiation outside of class
  }
  
  public static Singleton getInstance() {
    if (instance == null) {
      instance = new Singleton();
    }
    return instance;
  }
}

In this example, the `Singleton` class has a private constructor to prevent instantiation outside of the class. The `getInstance` method checks whether an instance of the class already exists and creates one if it does not. It then returns the existing or newly created instance.