这样做可以阻止toString方法输出过多内容。

Doing so prevents the toString method from printing a lot of output.

youdao

默认情况下，toString方法输出一个类的表示，这也许不能真正显示您想要查看的属性。

By default, the toString method prints a representation of the class that may not really show the properties you want to see.

youdao

通常，原生 toString() 方法输出的数组表示就像对象的原始表示一样，并不真正显示内容。

Normally, the native toString() method prints a representation of the array just like the original representation of the object, without really showing the contents.

youdao