Java programming realizes the addition, deletion, modification and query of data through the list interface. Code example

The list interface is commonly used to implement ArrayList.

Common methods: add (object obj) add an element add (int index, object obj) add an element at the specified index position remove (int index) delete the element at the specified position remove (object) delete the element set (index, object) from the list modify the element at the specified position get (int index) get the element at the specified position size () get the set size contains (object obj) Finds whether the passed in element exists in the collection

Code implementation:

Create a course class:

Operate on the list:

summary

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