How to call method in JAVA

The syntax format of method calling in Java language:

对象变量名.方法名（实参列表）;

Among them, the "actual parameter list" in parentheses is when calling the method The actual parameters actually passed in are called the actual parameter list. The parameters in parentheses when declaring a method are called formal parameters. The formal parameters and actual parameters must match in data type and number.

For example:

Class Addition declares the method add(int a, int b), and "int a, int b" in parentheses is the method Formal parameters, each parameter is separated by an English comma, where "int a" is the first parameter, "int b" is the second parameter, int is the data type of the parameter, and a and b are the names of the parameters.

In the main method of class Addition, declare and create the Addition object addition. The object addition calls its method add to calculate the sum of two numbers. The 20 and 102 passed in by calling the add method correspond to the formal parameters a and b respectively. , 20 and 102 are also called actual parameters.

Note: When calling a method, the number and order of formal parameters and actual parameters must be consistent, and the data types must also be the same.

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