Answered: 1) The UsingMethod class consists of a…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

1) The UsingMethod class consists of a main method and a method called xMethod. What will the code print?

public class UsingMethod {
public static void main(String[] args) {
double z = xMethod(3.5, 5.5);
System.out.println(z);
}
public static double xMethod(double x, double y) {
return x + y;
}
}

2) Identify the errors in the following programs

a) 3 errors
public class Test {
public static void main(String[] args) {
System.out.println(method2(3.4));
}

public static int method1(int n) {
if (n > 0) return 1;
else if (n == 0) return 0;
else if (n < 0) return -1;
}
}

b) 2 errors
public class Test {
public static void main(String[] args) {
nPrintln(5, "Welcome to Java!");
}
public static void nPrintln(String message, int n) {
for (int i = 0; i < n; i++) {
System.out.println(message);
}
return n;
}
}

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