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The Java Interview Handbook: 300+ Interview Questions

Method Arguments and Pass by Value

Explore how Java passes method arguments using varargs for flexible input and the pass-by-value mechanism to understand memory handling. This lesson helps you grasp how arguments are transferred and modified within methods, enhancing your programming accuracy.

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Java provides flexible ways to pass arguments to methods. We will first explore how to pass a variable number of arguments. After that, we will examine the underlying memory mechanics of how Java transfers these arguments during method invocation.

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What are varargs, and what rules govern their use in method signatures?

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Java
public void printNames(String... names) {
        for (String name : names) {
            System.out.println(name);
        }
    }
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