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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
Updated on: 21-Jun-2020
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