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BJP4 Self-Check 1.26: Confusing

Language/Type: Java classes method basics mystery println
Author: Marty Stepp (on 2016/09/08)

What is the output from the following Java program? 

public class Confusing {
    public static void method1() {
        System.out.println("I am method 1.");
    }

    public static void method2() {
        method1();
        System.out.println("I am method 2.");
    }

    public static void method3() {
        method2();
        System.out.println("I am method 3.");
        method1();
    }

    public static void main(String[] args) {
        method1();
        method3();
        method2();
        method3();
    }
}
output

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