For the String type that is always on, the comparison between "=" and "equal ()" is different.

For the String type that is always on, the comparison between "=" and "equal ()" is different.
Qual () compares the content in "". If the string type is met and there is no new object, equal () is used to compare the two values; if you encounter String s = ""; and there is no s = s1 + s2; in this form, use = to compare; if you encounter String s = ""; in addition, there is s = s1 + s2. In this form, equal () is used for comparison. In general, 8 basic types (String is an external class, not included) yes. equal () cannot be used to compare values. If the String type is met, equal () can be used.