The function of the tostring method in Java is to return a [text representation] string of this object. The result is a concise but easy-to-read information expression.
The role of the tostring method in java is
The toString method will return a "text representation" of this object String. The result is a concise yet easy-to-read expression of information. It is recommended that all subclasses override this method.
The toString method of the Object class returns a string, which consists of the class name (the object is an instance of this class), the at tag "@" and the unsigned hexadecimal hash code of this object The system represents the composition. In other words, this method returns a string whose value is equal to:
getClass().getName()+'@'+Integer.toHexString(hashCode())；
Returns: the string representation of the object
Because it is a method that already exists in Object, and All classes inherit Object, so "all objects have this method";
It is usually just for convenience of output, such as System.out.println(xx), the " in brackets xx" If it is not a String type, the toString() method of xx will be automatically called;
In short, it is just a special purpose designed to facilitate string operations of all classes when Sun developed Java. One way to join.
Extended information
tostring的使用示例
publicclassOrc
{
publicstaticclassA
{
publicStringtoString()
{
return"thisisA";
}
}
publicstaticvoidmain(String[]args)
{
Aobj=newA();
System.out.println(obj);
}
}Related learning recommendations: Java video tutorial
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