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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