Understanding Constructor injection by XML configuration

Merchant.java

     package com.javabykiran;
public class Merchant {
    int merchantId;
    String legalBusinessName;
    public Merchant(int merchantId, String legalBusinessName) {
	super();
        this.merchantId = merchantId;
	this.legalBusinessName = legalBusinessName;
    }
}

Config file – remove autowiring tag from this xml

     <bean id="merch" class="com.javabykiran.Merchant" />

Client.java

     Merchant merchant = (Merchant) ctx.getBean("merch");

Error on console

    Error creating bean with name 'merch' defined in class path resource 
    [spconfigConstructor.xml]: Instantiation of bean failed; 
    nested exception is org.springframework.beans.BeanInstantiationException: 
    Failed to instantiate [com.javabykiran.Merchant]: No default constructor found; 
    nested exception is java.lang.NoSuchMethodException: com.javabykiran.Merchant.<init>()

Config file – remove autowiring tag from this xml and add below lines.

     <bean id="merch" class="com.javabykiran.Merchant">
    <constructor-arg index="0" value="234"></constructor-arg>
    <constructor-arg index="1" value="kiran"></constructor-arg>
</bean>