What is the difference between constructors and ordinary functions in java

The differences between constructors and ordinary functions are as follows:

1. Differences in writing

Construction method:

public(修饰符) class（定义类的关键字） Test（类名）(){
    //无参
    Test（类名）（）{
    }
    //带一个参数
    Test（类名）（String(变量类型) name（变量名））{
    }
}

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Common method:

//定义类
public(修饰符) class（定义类的关键字） Test（类名）(){
    private(修饰符) static(修饰符) String(变量类型) s（变量名） = “hello world”;
    //下面是方法的定义
    public(修饰符) static(修饰符) void(返回值类型) main（方法名）（String[] args（参数）){
        System.out.println(s);（代码语句）
    }
}

2. Differences in operation

Construction method:

The construction method initializes the object when it is created; an object creation construction method can only be run once;

Ordinary method:

General The method is executed only when the object is called, adding the functions of the object to the object; general methods can be called multiple times by the object;

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