Class Cast Error Java

Exception in thread quotmainquot java.lang.ClassCastException class java.math.BigDecimal cannot be cast to class java.lang.String java.math.BigDecimal and java.lang.String are in module java.base of loader 'bootstrap' at Main.mainMain.java11 We can fix the exception printing by means of converting the code in the below format Java

Exception in thread quotmainquot java.lang.ClassCastException class Frog cannot be cast to class Mammal Frog and Mammal are in unnamed module of loader 'app' at Main.mainMain.java9 A checked downcast to Mammal is incompatible from a Frog reference because Frog is not a subtype of Mammal.

A class cast exception is thrown by Java when you try to cast an Object of one data type to another. Java allows us to cast variables of one type to another as long as the casting happens between compatible data types. For example you can cast a String as an Object and similarly an Object that contains String values can be cast to a String. Example

In Java, java.lang.ClassNotFoundException is a checked exception and occurs when the Java Virtual Machine JVM tries to load a particular class and the specified class cannot be found in the classpath. ClassNotFoundException should be handled with a try-catch block or using the throw keyword. In ol

Exception in thread quotmainquot java.lang.ClassCastException java.lang.Integer cannot be cast to java.lang.String at ClassCastExceptionExample.mainClassCastExceptionExample.java4 As you can see in the output, JVM throws a ClassCastException because we are trying to cast an object to an incompatible class. How to handle ClassCastException

The actual array type remains Object, and Java doesn't allow treating it as Integer at runtime. Therefore, this attempt fails Integer objArray. At this point, Java checks if objArray is actually an Integer. Since its actual runtime type is Object, the cast fails, resulting in a ClassCastException. 4. Resolving the Issue

Since it is not an instance of the Integer class, this operation throws a ClassCastException Exception in thread quotmainquot java.lang.ClassCastException class java.lang.String cannot be cast to class java.lang.Integer at ClassCastExceptionExample.mainClassCastExceptionExample.java4 How to Fix ClassCastException

1. What is ClassCastException?. A ClassCastException is a runtime exception that occurs when an attempt is made to cast an object to a subclass or interface that it doesn't implement. For instance, casting a String to an Integer would result in this exception.. Object obj quotHelloquot Integer num Integer obj Throws ClassCastException 2. Common Scenarios Where ClassCastException Occurs

Exception in thread quotmainquot java.lang.ClassCastException java.lang.Integer cannot be cast to java.lang.String at main.java.ClassCastExceptionExample.mainClassCastExceptionExample.java6 The next example is more complex and aims to show that an instance of the parent class cannot be casted to an instance of the child class

The Java programming language is known for its robust type-safety mechanisms that help prevent many runtime errors. However, one common exception that developers often encounter is the ClassCastException in Java. ClassCastException in Java occurs when an attempt is made to cast an object to a class type that it is not an instance of.