Constructor injection in spring

Summary

• Analyze the output of this code.
• The sum is 30 since the type is int and index is 1 and 0 respectively.
• Since index is 1 for 1st constructor, the value of a is 20.
• Since index is 0 for 2nd constructor, the value of b is 10.

Syntax

`

<bean class="com.constructor.injection.beans.AddNumber" id="addNumber">
    <constructor-arg type="int" index="1" value="10" />
    <constructor-arg type="int" index="0" value="20" />
</bean>

`

Conclusion

• Spring calls public AddNumber(int a, int b) constructor and hence the output.