Java Arrays toString(boolean[])Method

Description

The Java Arrays toString(boolean[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(boolean) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(boolean[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(byte[]) Method

Description

The Java Arrays toString(byte[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(byte) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(byte[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(char[]) Method

Description

The Java Arrays toString(char[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(char) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(char[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(double[]) Method

Description

The Java Arrays toString(double[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(double) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(double[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(float[]) Method

Description

The Java Arrays toString(float[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(float) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(float[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(int[]) Method

Description

The Java Arrays toString(int[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(int) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(int[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(long[]) Method

Description

The Java Arrays toString(long[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(long) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(long[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(short[]) Method

Description

The Java Arrays toString(short[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". String.valueOf(short) is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(short[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Java Arrays toString(Object[]) Method

Description

The Java Arrays toString(Object[]) method returns a string representation of the contents of the specified array. It consists of a list of the array's elements, enclosed by square brackets ("[]"). Adjacent elements are separated by the characters ", ". Arrays.asList(a).toString() is used to convert elements to String. Returns "null" if a is null.

Declaration

Following is the declaration for java.util.Arrays.toString() method

public static String toString(Object[] a)

Parameters

a − This is the array whose string representation is to be returned.

Return Value

This method returns a string representation for a.

Exception

NA

Getting String Representation of Arrays of boolean, byte, char and double Example

The following example shows the usage of Java Arrays toString() methods for boolean[], byte[], char[] and double[]. First, we've created four arrays of boolean, byte, char and double and then their string representation is printed using Arrays toString() method.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing arrays
      boolean[] boolArr = new boolean[] { true, true };
      byte[] byteArr = new byte[] {10, 20 };
      char[] charArr = new char[] {'A', 'B' };
      double[] doubleArr = new double[] {10.0, 20.0 };

      // printing hash code value
      System.out.println("The string representation of boolean array is: " + Arrays.toString(boolArr));
      System.out.println("The string representation of byte array is: " + Arrays.toString(byteArr));
      System.out.println("The string representation of char array is: " + Arrays.toString(charArr));
      System.out.println("The string representation of double array is: " + Arrays.toString(doubleArr));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

The string representation of boolean array is: [true, true]
The string representation of byte array is: [10, 20]
The string representation of char array is: [A, B]
The string representation of double array is: [10.0, 20.0]

Getting String Representation of Arrays of float, int, long and short Example

The following example shows the usage of Java Arrays toString() methods for float[], int[], long[] and short[]. First, we've created four arrays of float, int, long and short and then their string representation is printed using Arrays toString() method.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing arrays
      float[] floatArr = new float[] { 10.0f, 20.f };
      int[] intArr = new int[] {10, 20 };
      long[] longArr = new long[] { 10L, 20L };
      short[] shortArr = new short[] {10, 20 };

      // printing hash code value
      System.out.println("The string representation of float array is: " + Arrays.toString(floatArr));
      System.out.println("The string representation of int array is: " + Arrays.toString(intArr));
      System.out.println("The string representation of long array is: " + Arrays.toString(longArr));
      System.out.println("The string representation of short array is: " + Arrays.toString(shortArr));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

The string representation of float array is: [10.0, 20.0]
The string representation of int array is: [10, 20]
The string representation of long array is: [10, 20]
The string representation of short array is: [10, 20]

Getting String Representation of Arrays of Object Example

The following example shows the usage of Java Arrays toString() methods for Object[]. First, we've created an array of Student object and then their string representation is printed using Arrays toString() method.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing array
      Student[] students = { new Student(1, "Julie"), new Student(3, "Adam"), new Student(2, "Robert") };

      // printing hash code value
      System.out.println("The string representation of Student array is: " + Arrays.toString(students));
   }
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

Let us compile and run the above program, this will produce the following result −

The string representation of Student array is: [[ 1, Julie ], [ 3, Adam ], [ 2, Robert ]]
java_util_arrays.htm
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