You can use Apache ToStringBuilder class. Here is an example from documentation: public class Person { String name; int age; boolean smoker;... public String toString () { return new ToStringBuilder (this). append ("name", name). append ("age", age). append ("smoker", smoker). toString (); } }
Full Answer
Why we can't use ToString () method to print the string value?
We have not used toString () to print the String value, because println () method by default uses toString () method internally. We have not implemented the toString () method, Java has itself overridden it for us.
What is the use of toString () method in Java?
This method is very crucial in any Java program. It is used to log the object using toString () in Java applications to assist with any future bugs. It can be used to convert any numeral value to String using this method.
Which classes have overridden the toString () method?
The collection classes, String class, StringBuilder and StringBuffer have also overridden the toString () method as well. Let’s check the running code to make it more clear.
How is toString implemented?
The toString method is used to return a string representation of an object. If any object is printed, the toString() method is internally invoked by the java compiler. Else, the user implemented or overridden toString() method is called. Here are some of the advantages of using this method.
How do you create a toString method in Java?
0:000:54How to Generate toString using eclipse? - Java Tutorial - YouTubeYouTubeStart of suggested clipEnd of suggested clipClick source click on generate to string. Click and here you can see two string method has beenMoreClick source click on generate to string. Click and here you can see two string method has been created with the three fields. Name age and salary.
What is difference between toString and Converttostring?
Here both the methods are used to convert the string but the basic difference between them is: "Convert" function handles NULLS, while "i. ToString()" does not it will throw a NULL reference exception error. So as good coding practice using "convert" is always safe.
What is toString method in Java?
Java - toString() Method The method is used to get a String object representing the value of the Number Object. If the method takes a primitive data type as an argument, then the String object representing the primitive data type value is returned.
Why do we use toString in Java?
What is the purpose of toString() method in Java? If we want to represent an object of a class as a String, then we can use the toString() method which returns a textual representation of the object. When you print an object, by default the Java compiler invokes the toString() method on the object.
How do I print toString object?
The toString() method returns the String representation of the object. If you print any object, Java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired output, it can be the state of an object etc. depending on your implementation.
What is ToString () C#?
ToString is the major formatting method in the . NET Framework. It converts an object to its string representation so that it is suitable for display.
How do I convert a string to lowercase?
To convert a string to lowercase in Java, call toLowerCase() method on the string object. The method returns a new String object with the characters in the original string transformed to lowercase letters.
What is NULL ToString?
ToString(null) returns a null value, not an empty string (this can be verified by calling Convert. ToString(null) == null , which returns true ). However, passing a null variable indeed equals to null, so that object v = null; Convert.
Where is toString method in Java?
Object toString() Method in Java. Object class is present in java. lang package. Every class in Java is directly or indirectly derived from the Object class, henceforth it is a child of the Object class.
How do you toString an int?
Java int to String Example using Integer. toString()public class IntToStringExample2{public static void main(String args[]){int i=200;String s=Integer.toString(i);System.out.println(i+100);//300 because + is binary plus operator.System.out.println(s+100);//200100 because + is string concatenation operator.}}
Is toString automatically called?
toString() gets invoked automatically. Object. toString() 's default implementation simply prints the object's class name followed by the object's hash code which isn't very helpful. So, one should usually override toString() to provide a more meaningful String representation of an object's runtime state.
Overview
The toString method is a method of the object class in java and it is inherited by all the classes in java by default. It provides the string representation of any object in java.
Scope
In this article, we will learn about the toString method and its default implementation.
Override the toString () method in Java
Here we can see, we have written our custom implementation, where we have concatenated the name and rollNo of the student to the returning String. On running the code
Java Classes with toString () Overridden by Default
Let’s talk about some of the classes in Java that have implemented the toString () method to give some meaningful String representation of the objects. In Java, all the wrapper classes like Byte, Integer, Long, Float, Double, Boolean, Character have overridden the toString () method.
Using static toString () method in Wrapper Classes
The Wrapper classes in Java have a static implementation of the toString () method as well. We can directly get the String value without defining an object of the class.
Using valueOf () method in String Class
One more way to get the String value is to use the String.valueOf () method of the String class, which internally calls the toString () method of that particular object.
Conclusion
Here in this article, we have seen how we can use the toString () method in different ways. This method is very crucial in any Java program.
