Java Integer toString() Method

The toString() method of Java Integer class is used to get a String object representing the value of the Number Object. There are three different types of Java toString() method which can be differentiated depending on its parameter.

These are:

Java Integer toString() Method
Java Integer toString(int i) Method
Java Integer toString(int i, int radix) Method

1. Java Integer toString() Method

The toString() method of Java Integer class returns a string equivalent of this Integer's value. This method gives the same result as Integer.toString(int i). It overrides the toString() method of class Object.

2. Java Integer toString(int i) Method

The toString(int i) is an inbuilt method of Java which is used to return a String object representing the specified integer in the method argument.

3. Java Integer toString(int i, int radix) Method

This method returns a string representation of the first int type argument in the radix specified by the second argument. If the radix is smaller than Character.MIN_RADIX or larger than Character.MAX_RADIX then the base 10 is used. In this method, the following ASCII characters are used as digits: 0 to 9 and a to z.

Note: If the first argument is negative, the result of the first element is the ASCII minus character '-'.

Syntax:

Following is the declarations of toString() method:

public String toString()
public static String toString(int i)
public static String toString(int i, int radix)

Parameter:

DataType	Parameter	Description	Required/Optional
int	i	It is an integer value specified by the user to be converted to a string.	Required
int	radix	This is of integer type and used in converting the string object.	Required

Returns:

Method	Returns
toString()	It returns a string representation of the value of this integer object in base 10.
toString(int i)	It returns a string representation of the int type argument in base 10.
toString(int i, int radix)	It returns a string representation of the int type argument in the specified radix.

Exceptions:

Compatibility Version:

Java 1.0 and above

Example 1

public class IntegerToStringExample1 {
	public static void main(String[] args) {
		Integer obj = 25;     
		//It will return a string value    
		String strval1 = obj.toString();
		System.out.println("String Representation = " + strval1);		     
		Integer obj2 = -18;		     
		//It will return a string value
		String strval2 = obj2.toString();
		System.out.println("String Representation = " + strval2);
            }
}

Output:

String Representation = 25
String Representation = -18

Example 2

public class IntegerToStringExample2 {
	public static void main(String[] args) {
	    System.out.println("Output: "+Integer.toString(-12)); 
	    System.out.println("Output: "+Integer.toString(12)); 
          }
}

Output:

Output: -12
Output: 12

Example 3

import java.util.Scanner;
public class IntegerToStringExample3 {
	public static void main(String[] args) {
	  //Enter the user input
	  System.out.print("Enter Number to be string representation : ");
	  Scanner scan = new Scanner(System.in);
	  int value = scan.nextInt();
	  scan.close();
	  //Print the value in decimal format
	  System.out.println("Output: "+Integer.toString(value));
        }
}

Output:

Enter Number to be string representation : -3465.876
Exception in thread "main" java.util.InputMismatchException
	at java.base/java.util.Scanner.throwFor(Scanner.java:939)
	at java.base/java.util.Scanner.next(Scanner.java:1594)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
	at myPackage.IntegerToStringExample3.main(IntegerToStringExample3.java:10)

Example 4

public class IntegerToStringExample4 {
	public static void main(String[] args) {
	    //Returns a string representation of the specified integer with radix 10
	    String returnval1 = Integer.toString(65, 10);
	    System.out.println("String Value = " + returnval1); 
	    //Returns a string representation of the specified integer with radix 16
	    String returnval2 = Integer.toString(65, 16);
	    System.out.println("String Value = " + returnval2);
	    //Returns a string representation of the specified integer with radix 8
	    String returnval3 = Integer.toString(65, 8);
	    System.out.println("String Value = " + returnval3);
	    //Returns a string representation of the specified integer with radix 2
	    String returnval4 = Integer.toString(65, 2);
	    System.out.println("String Value = " + returnval4);
          }
}

Output:

String Value = 65
String Value = 41
String Value = 101
String Value = 1000001

Example 5

import java.util.Scanner;
public class IntegerToStringExample5 {
	public static void main(String[] args) {
	    //Enter the user input
	    System.out.println("Enter Inputs to be string representation: ");
	    Scanner scan = new Scanner(System.in);
	    System.out.print("Enter Number: ");
	    int value = scan.nextInt();
	    System.out.print("Enter Radix/Base: ");
	    int base = scan.nextInt();
	    scan.close();
	    //Print the value in decimal format
	    System.out.println("Output: "+Integer.toString(value, base));
        }
}

Output:

Enter Inputs to be string representation: 
Enter Number: -45648
Enter Radix/Base: 16
Output: -b250

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Java Integer toString() Method

1. Java Integer toString() Method

2. Java Integer toString(int i) Method

3. Java Integer toString(int i, int radix) Method

Note: If the first argument is negative, the result of the first element is the ASCII minus character '-'.

Syntax:

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

Example 5

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Java Integer toString() Method

1. Java Integer toString() Method