Java - String valueOf() Method

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Description

The Java String valueOf(boolean b) method is used to get string representation of the passed argument. This method has multiple polymorphic variants. The syntaxes of these methods are given below.

Declaration

Following is the declaration for java.lang.String.valueOf() method

public static String valueOf(boolean b)
or
public static String valueOf(char c)
or
public static String valueOf(char[] data)
or
public static String valueOf(char[] data, int offset, int count)
or
public static String valueOf(int i)
or
public static String valueOf(double d)
or
public static String valueOf(float f
or
public static String valueOf(long l)
or
public static String valueOf(Object obj)
or

Parameters

• data − This is a input to be evaluated.

• offset − This is the initial offset into the value of the String.

• count − This is the length of the value of the String.

Return Value

if the argument is true, a string equal to "true" is returned else, a string equal to "false" is returned.

Exception

IndexOutOfBoundsException − if offset is negative, or count is negative, or offset+count is larger than data.length.

Getting String Representation of Boolean Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated boolean values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      String str1 = String.valueOf(true);
      String str2 = String.valueOf(false);

      // print the string representation of boolean
      System.out.println(str1);
      System.out.println(str2);
   }
}

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

true
false

Getting String Representation of Char Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated char values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      String str1 = String.valueOf('k');
      String str2 = String.valueOf('m');

      // print the string representation of char
      System.out.println(str1);
      System.out.println(str2);
   }
}

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

k
m

Getting String Representation of Char Array Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated char array values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      // character array chararray1
      char[] chararr1 = new char[] { 't', 'u', 't', 's' };
      String str1 = String.valueOf(chararr1);

      // character array chararray2
      char[] chararr2 = new char[] { '2', '1', '5' };
      String str2 = String.valueOf(chararr2);

      // prints the string representations   
      System.out.println(str1);
      System.out.println(str2);
   }
}

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

tuts
215

Getting String Representation of char array with offset Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated char array values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      // character array chararray1 with offset 2
      char[] chararr1 = new char[] { 't', 'u', 't', 's' };
      String str1 = String.valueOf(chararr1, 2, 2);

      // character array chararray2 with offset 1
      char[] chararr2 = new char[] { '2', '1', '5' };
      String str2 = String.valueOf(chararr2, 1, 2);

      // prints the string representations   
      System.out.println(str1);
      System.out.println(str2);
   }
}

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

ts
15

Getting String Representation of Double Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated double values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

  public static void main(String[] args) {

      String str1 = String.valueOf(12.97);
      String str2 = String.valueOf(Double.MIN_VALUE);
      String str3 = String.valueOf(Double.MAX_VALUE);

      // print the string representation of double
      System.out.println(str1);
      System.out.println(str2);
      System.out.println(str3);
   }
}

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

12.97
4.9E-324
1.7976931348623157E308

Getting String Representation of Float Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated float values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      String str1 = String.valueOf(12.85f);
      String str2 = String.valueOf(Float.MIN_VALUE);
      String str3 = String.valueOf(Float.MAX_VALUE);

      // prints the string representations of float
      System.out.println(str1);
      System.out.println(str2);
      System.out.println(str3);
   }
}

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

12.85
1.4E-45
3.4028235E38

Getting String Representation of Int Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated integer values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      String str1 = String.valueOf(50);
      String str2 = String.valueOf(Integer.MIN_VALUE);
      String str3 = String.valueOf(Integer.MAX_VALUE);

      // prints the string representations of int
      System.out.println(str1);
      System.out.println(str2);
      System.out.println(str3);
   }
}

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

50
-2147483648
2147483647

Getting String Representation of Long Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated long values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {
      String str1 = String.valueOf(432567);
      String str2 = String.valueOf(Long.MIN_VALUE);
      String str3 = String.valueOf(Long.MAX_VALUE);

      // prints the string representations of long
      System.out.println(str1);
      System.out.println(str2);
      System.out.println(str3);
   }
}

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

432567
-9223372036854775808
9223372036854775807

Getting String Representation of Object Example

The following example shows the usage of java.lang.String.valueOf() method. We've evaluated String as Object values and then printed the result.

package com.tutorialspoint;

public class StringDemo {

   public static void main(String[] args) {

      String str = "compile online";
      Object objVal = str;
   
      // returns the string representation of the Object argument
      System.out.println("Value = " + str.valueOf(objVal));
   }
}

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

Value = compile online