Different ways for Integer to String conversion in Java

Following are the different ways to convert an Integer to String in Java.

Using Integer.toString(int) − Convert an int to String using static toString() method of Integer class.
```
String b = Integer.toString(125);
```
Using String.valueOf(int) − Convert an int to String using static valueOf() method of String class.
```
String b = String.valueOf(125);
```
Using new Integer(int).toString() − Convert an int to String using toString() method of Integer object.
```
String b = new Integer(125).toString();
```
Using DecimalFormat(pattern).format(int) − Convert an int to String using DecimalFormat.format() method.
```
String b = new DecimalFormat("#").format(125);
```
Using StringBuilder().toString() − Convert an int to String using StringBuilder.toString() method.
```
String b = new StringBuilder().append(125).toString();
```
Using StringBuffer().toString() − Convert an int to String using StringBuffer.toString() method.
```
String b = new StringBuffer().append(125).toString();
```

Example

import java.text.DecimalFormat;

public class Tester {
   public static void main(String args[]) {
      int a = 125;

      String b = Integer.toString(a);
      System.out.println("Scenario 1: Integer.toString(int): " + b);

      b = String.valueOf(a);
      System.out.println("Scenario 2: String.valueOf(int): " + b);

      b = new Integer(a).toString();
      System.out.println("Scenario 3: new Integer(int).toString(): " + b);

      b = new DecimalFormat("#").format(a);
      System.out.println("Scenario 4: new DecimalFormat(\"#\").format(int): " + b);

      b = new StringBuilder().append(a).toString();
      System.out.println("Scenario 5: new StringBuilder().append(int).toString(): " + b);

      b = new StringBuffer().append(a).toString();
      System.out.println("Scenario 6: new StringBuffer().append(int).toString(): " + b);
   }
}

Output

Scenario 1: Integer.toString(int): 125
Scenario 2: String.valueOf(int): 125
Scenario 3: new Integer(int).toString(): 125
Scenario 4: new DecimalFormat("#").format(int): 125
Scenario 5: new StringBuilder().append(int).toString(): 125
Scenario 6: new StringBuffer().append(int).toString(): 125

Fendadis John

Updated on: 2020-06-21T12:40:05+05:30

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