In this article, we will discuss various ways to convert Character[] array to String in Java
Q) What is the need of converting primitive char[] array or wrapper-type Character[] array to String ?
- Generally, whenever we receive or send data from web application then it is passed in the form of String only
- Sometimes for displaying purpose, a char[] array needs to be converted into string
- This article explains about primitive char[] array or Character[] array wrapper-type to String conversion only, but we can do conversion for other types like int, double, float, long, boolean, etc. to String object
- Note: Likewise, sometime String to char[] array conversion is also required
Various ways to convert Character[] array to String:
- Using Arrays.toString(chArray);
- Using String.valueOf(chArray);
- Using copyValueOf(chArray); method of String class
- Create String object and then pass char[] array in the constructor {new String(chArray);}
- Using append() method of StringBuffer & StringBuilder class
Read String class in detail with example
Let us move forward and discuss all possible ways to convert Character[] array to String in Java
1. Using Arrays.toString(chArray); method
- This method can be used to convert primitive char[] array to String object
Method signature:
public static String toString(char[] a);
ConvertCharacterArrayIntoStringUsingToStringMethod.java
package in.bench.resources.character.array.to.string.conversion;
import java.util.Arrays;
public class ConvertCharacterArrayIntoStringUsingToStringMethod {
public static void main(String[] args) {
// primitive char[] array
char[] chArray1 = {'B', 'e', 'n', 'c', 'h'};
// 1. converting char[] array to String
// by using toString() method
String str1 = Arrays.toString(chArray1);
System.out.println("1. Converted String values are : "
+ str1);
// primitive char[] array
char[] chArray2 =
new char[]{'R', 'e',
's', 'o', 'u', 'r', 'c', 'e', 's'};
// 2. converting char[] array to String
// by using toString() method
String str2 = Arrays.toString(chArray2);
System.out.println("\n2. Converted String values are : "
+ str2);
// Character object
Character[] chArray3 =
new Character[]{'G', 'o', 'o', 'g', 'l', 'e'};
// 3. converting Character[] array object to String
// by using toString() method
String str3 = Arrays.toString(chArray3);
System.out.println("\n3. Converted String values are : "
+ str3);
}
}
Output:
1. Converted String values are : [B, e, n, c, h]
2. Converted String values are : [R, e, s, o, u, r, c, e, s]
3. Converted String values are : [G, o, o, g, l, e]
2. Using String.valueOf(chArray); method
- This method can be used to convert primitive char[] array to String object
Method signature:
public static String valueOf(char data[]);
ConvertCharacterArrayIntoStringUsingValueOfMethod.java
package in.bench.resources.character.array.to.string.conversion;
public class ConvertCharacterArrayIntoStringUsingValueOfMethod {
public static void main(String[] args) {
// primitive char[] array
char[] chArray1 = {'B', 'e', 'n', 'c', 'h'};
// 1. converting char[] array to String
// by using toString() method
String str1 = String.valueOf(chArray1);
System.out.println("1. Converted"
+ " primitive char[] array to String value is : "
+ str1);
// primitive char[] array
char[] chArray2 = new char[]{'R', 'e',
's', 'o', 'u', 'r', 'c', 'e', 's'};
// 2. converting char[] array to String
// by using toString() method
String str2 = String.valueOf(chArray2);
System.out.println("\n2. Converted"
+ " primitive char[] array to String value is : "
+ str2);
}
}
Output:
1. Converted primitive char[] array to String value is : Bench
2. Converted primitive char[] array to String value is : Resources
3. Using copyValueOf(chArray); method of String class
- This method can be used to convert primitive char[] array to String object
Method signature:
public static String copyValueOf(char data[]);
ConvertCharacterArrayIntoStringUsingCopyValueOfMethod.java
package in.bench.resources.character.array.to.string.conversion;
public class ConvertCharacterArrayIntoStringUsingCopyValueOfMethod {
public static void main(String[] args) {
// primitive char[] array
char[] chArray1 = {'B', 'e', 'n', 'c', 'h'};
// 1. converting char[] array to String
// by using copyValueOf() method
String str1 = String.copyValueOf(chArray1);
System.out.println("1. Converted String value is : "
+ str1);
// primitive char[] array
char[] chArray2 = new char[]{'R', 'e',
's', 'o', 'u', 'r', 'c', 'e', 's'};
// 2. converting char[] array to String
// by using copyValueOf() method
String str2 = String.copyValueOf(chArray2);
System.out.println("\n2. Converted String value is : "
+ str2);
}
}
Output:
1. Converted String value is : Bench
2. Converted String value is : Resources
3. Create String object and then pass char[] array in the constructor {new String(chArray);}
- Here, we will create new String object and then pass char[] array object as constructor-argument
- After creating new String object by passing char[] array, then invoke toString() method for converting char[] array to String object
Method signature:
public String(char value[]);
public String toString();
ConvertCharacterArrayIntoStringUsingObjectCreation.java
package in.bench.resources.character.array.to.string.conversion;
public class ConvertCharacterArrayIntoStringUsingObjectCreation {
public static void main(String[] args) {
// primitive char[] array
char[] chArray1 = {'B', 'e', 'n', 'c', 'h'};
// 1. converting char[] array to String
// by creating String object
String strObj1 = new String(chArray1);
// and then invoke toString(); method
String str1 = strObj1.toString();
System.out.println("1. Converted String value is : "
+ str1);
// primitive char[] array
char[] chArray2 = new char[]{'R', 'e',
's', 'o', 'u', 'r', 'c', 'e', 's'};
// 2. converting char[] array to String
// by creating String object
String strObj2 = new String(chArray2);
// and then invoke toString(); method
String str2 = strObj2.toString();
System.out.println("\n2. Converted String value is : "
+ str2);
}
}
Output:
1. Converted String value is : Bench
2. Converted String value is : Resources
5. Using append() method of StringBuffer & StringBuilder class
- This method can be used to convert primitive char[] array to String object by appending to StringBuffer or StringBuilder object
- And then invoking toString() method
Syntax:
StringBuffer sb = sb.append(chArray);
String temp = sb.toString();
ConvertCharacterArrayIntoStringByAppending.java
package in.bench.resources.character.array.to.string.conversion;
public class ConvertCharacterArrayIntoStringByAppending {
public static void main(String[] args) {
// primitive char[] array
char[] chArray1 = {'B', 'e', 'n', 'c', 'h'};
// 1. converting char[] array to String
// by using append() method
StringBuffer sb1 = new StringBuffer();
String str1 = sb1.append(chArray1).toString();
System.out.println("1. Converted String value is : "
+ str1);
// primitive char[] array
char[] chArray2 = new char[]{'R', 'e',
's', 'o', 'u', 'r', 'c', 'e', 's'};
// 2. converting char[] array to String
// by using append() method
StringBuffer sb2 = new StringBuffer();
String str2 = sb2.append(chArray2).toString();
System.out.println("\n2. Converted String value is : "
+ str2);
}
}
Output:
1. Converted String value is : Bench
2. Converted String value is : Resources
Hope, you found this article very helpful. If you have any suggestion or want to contribute any other way or tricky situation you faced during Interview hours, then share with us. We will include that code here.
Related Articles:
- String to int conversion – 3 ways
- Integer to String conversion – 6 ways
- String to float conversion – 3 ways
- Float to String conversion – 6 ways
- String to double conversion – 3 ways
- Double to String conversion – 6 ways
- String to long conversion – 3 ways
- Long to String conversion – 6 ways
- String to boolean conversion – 3 ways
- Boolean to String conversion – 6 ways
- String to char conversion
- Character to String conversion – 6 ways
- String to char[] array conversion – 4 ways
- Character[] array to String conversion – 5 ways
- String to byte conversion – 3 ways
- Byte to String conversion – 5 ways
- String to byte[] array conversion
- Byte[] array to String conversion
- String to short conversion – 3 ways
- Short to String conversion – 5 ways
- StringBuffer to String conversion and vice-versa
- StringBuilder to String conversion and vice-versa
- String to Date conversion
- Date to String conversion
References:
- https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
- https://docs.oracle.com/javase/tutorial/java/data/numberclasses.html
- https://docs.oracle.com/javase/tutorial/java/data/autoboxing.html
- https://docs.oracle.com/javase/tutorial/java/data/converting.html
- https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html
- https://docs.oracle.com/javase/6/docs/api/java/lang/Character.html
- https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html
- https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html
- https://docs.oracle.com/javase/tutorial/java/data/strings.html
- https://docs.oracle.com/javase/6/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/7/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/8/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/6/docs/api/java/lang/class-use/String.html
- https://docs.oracle.com/javase/7/docs/api/java/lang/class-use/String.html
- https://docs.oracle.com/javase/8/docs/api/java/lang/class-use/String.html
- https://docs.oracle.com/javase/tutorial/essential/concurrency/immutable.html
- https://docs.oracle.com/javase/tutorial/essential/concurrency/imstrat.html
Happy Coding !!
Happy Learning !!
