Java Program to Convert Object to String

In the previous article we have discussed Java Program to Convert Timestamp to Date

In this article we will see how to convert Object to String.

Program to Convert Object to String

Let’s see different approaches one by one.

By Using toString() method
By Using valueOf() method
Converting StringBuilder Object toString

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Method-1: Java Program to Convert Object to String By Using toString() method

Let’s say obj is the object of an User Defined class. We can convert this object to String by using toString() method. Let’s see the program to know how it actually works.

Program:

//A user defined class
//Student class created
class Student
{
    
}
//Driver class
//Main class
public class Main
{  
    public static void main(String args[])
    {  
        //object of Student class created
        Student obj=new Student(); 
        //converting object to String by using toString() method
        //and assigning the converted string value to a string variable str
        String str=obj.toString(); 
        //printing the string value
        System.out.println("Converted object to String : "+str);  
    }
}

Output:

Converted object to String : Student@6a6824be

Method-2: Java Program to Convert Object to String By Using valueOf() method

Let’s say obj is the object of an User Defined class. We can convert this object to String by using valueOf() method. Let’s see the program to know how it actually works.

//A user defined class
//Student class created
class Student
{
    
}
//Driver class
//Main class
public class Main
{  
    public static void main(String args[])
    {  
        //object of Student class created
        Student obj=new Student(); 
        //converting object to String by using valueOf() method
        //and assigning the converted string value to a string variable str
        String str=String.valueOf(obj);  
        //printing the string value
        System.out.println("Converted object to String : "+str);  
    }
}

Output:

Converted object to String : Student@6a6824be

Method-3: Java Program to Convert Object to String Converting StringBuilder Object toString

In this method we have converted the object of StringBuilder class to String. Let’s see the program to know how it actually works.

str is a string variable which holds astring value.
sb is the object of StringBuilder class
output is the string variable which holds the converted value(object to string)

//A user defined class
//Student class created
class Student
{
    
}
//Driver class
//Main class
public class Main
{  
    public static void main(String args[])
    {  
        //String varible declared with assigned value as "BTechGeeks"
        String str="BtechGeeks"; 
        //Object of StringBuilder class created 'sb'
        //And string 'str' passed to StringBuilder Object
        StringBuilder sb=new StringBuilder(str);  
        //StringBuilder to String
        //object to string
        String output=sb.toString();
        System.out.println("String is : "+str);  
        System.out.println("Converted object to String : "+str);  
    }
}

Output:

String is : BtechGeeks
Converted object to String : BtechGeeks

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