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BJP3 Self-Check 1.27: Confusing2

Language/Type: Java classes method basics mystery println
Author: Roy McElmurry (on 2013/04/01)

What is the output produced from the following program? You may wish to draw a structure diagram first. This is a slightly modified version of the previous problem, Confusing. 

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

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

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

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

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