17 Aug When Overflow of DataTypes occur in Java
When a value more than the Maximum value of a datatype is assigned, it leads to Overflow. Java handles overflow of datatypes on its own, for example, if we will increment 1 to Integer.MAX_VALUE, an error won’t be visible. However, the output will be Integer.MIN_VALUE.
Let us now see some examples displaying how Java handles overflow of datatypes:
Example 1
The code shows how Java handles overflow of int datatype:
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public class Example { public static void main(String[] args) { System.out.println("int type MAXIMUM Value = " + Integer.MAX_VALUE); System.out.println("int type MINIMUM Value = " + Integer.MIN_VALUE); System.out.println("\nOn incrementing, the result is equivalent to integer's minimum value..."); System.out.println("\nIncrementing Integer Maximum Value = " + (Integer.MAX_VALUE+1)); } } |
Output
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int type MAXIMUM Value = 2147483647 int type MINIMUM Value = -2147483648 On incrementing, the result is equivalent to integer's minimum value... Incrementing Integer Maximum Value = -2147483648 |
Example 2
The code shows how Java handles overflow of long datatype:
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public class Example { public static void main(String[] args) { System.out.println("long type MAXIMUM Value = " + Long.MAX_VALUE); System.out.println("long type MINIMUM Value = " + Long.MIN_VALUE); System.out.println("\nOn incrementing, the result is equivalent to long's minimum value..."); System.out.println("\nIncrementing long Maximum Value = " + (Long.MAX_VALUE+1)); } } |
Output
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long type MAXIMUM Value = 9223372036854775807 long type MINIMUM Value = -9223372036854775808 On incrementing, the result is equivalent to long's minimum value... Incrementing long Maximum Value = -9223372036854775808 |
However, this is not the case with any other datatype. Let’s see another example wherein we are multiplying the Maximum value of Float type:
Example 3
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public class Example { public static void main(String[] args) { System.out.println("float type MAXIMUM Value = " + Float.MAX_VALUE); System.out.println("float type MINIMUM Value = " + Float.MIN_VALUE); System.out.println("\nUpdating Float Maximum Value = " + (Float.MAX_VALUE*5)); } } |
Output
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float type MAXIMUM Value = 3.4028235E38 float type MINIMUM Value = 1.4E-45 Updating Float Maximum Value = Infinity |
In the above output, we are getting Infinity i.e. Overflow since we exceeded the maximum value of Float Datatype in Java.
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