objects.nonnull()方法与objects.isnull()f方法有什么区别
时间: 2024-05-30 09:12:45 浏览: 23
objects.nonnull()方法和objects.isnull()方法的区别在于,objects.nonnull()方法会返回一个布尔值,表示该对象是否为非空值,而objects.isnull()方法会返回一个布尔值,表示该对象是否为null。换句话说,objects.nonnull()方法判断对象是否存在,而objects.isnull()方法判断对象是否为null。
相关问题
Objects.nonNull
As an AI language model, I do not have access to a specific programming language or framework. However, in general, the Objects.nonNull method is used in Java to check if an object is not null. If the object is null, a NullPointerException is thrown. This method is useful to ensure that an object is not null before using it in a method or function. Here is an example:
```
public void doSomething(Object obj) {
Objects.nonNull(obj);
// Do something with obj
}
```
In this example, the Objects.nonNull method is used to check if the obj parameter is not null before using it in the doSomething method. If obj is null, a NullPointerException will be thrown.
objects.nonnull
`Objects.nonNull` is a static utility method in Java's `java.util.Objects` class that is used to check if an object reference is not null. It takes an object reference as its argument and throws a `NullPointerException` if the reference is null. If the reference is not null, the method returns the reference unchanged.
It is commonly used in situations where a null check is needed to avoid potential `NullPointerExceptions`. For example:
```
public void doSomething(Object obj) {
Objects.requireNonNull(obj, "Object parameter cannot be null");
// rest of the method logic
}
```
In the above code, if the `obj` parameter is null, a `NullPointerException` will be thrown with the given error message. If `obj` is not null, the method will continue to execute.
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