Class notes | Loops COMP 150 (COMP150) Introduction to Java Programming and Data Structures, ISBN: 9780134670942
COMPLETE TEST BANK FOR INTRODUCTION TO JAVA PROGRAMMING AND DATA STRUCTURES COMPREHENSIVE VERSION, 12TH EDITION, Y. DANIEL LIANG.
COMPLETE TEST BANK FOR INTRODUCTION TO JAVA PROGRAMMING AND DATA STRUCTURES COMPREHENSIVE VERSION, 12TH EDITION, Y. DANIEL LIANG.
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University of the Fraser Valley (UFV)
Chemistry
COMP 150 (COMP150)
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Methods
Date @October 7, 2022
Introduction to Java Programming and Data Structures, Comprehensive
Text Version: Chapter 6
Defining Methods
A method is a collection of statements that are grouped together to perform an
operation
// define the method
public static int max(int num1, int num2) {
int result;
if (num1>num2) {
result = num1;
} else {
result = num2
}
return result;
}
// invoke the method
int z = max(x, y);
public static int max(int num1, int num2) - method header
public static - modifier
int - returnValueType
the data type of the value that is returned by the method
if the method does not return a value, the returnValueType is the keyword void
max - method name
(int num1, int num2) - method signature
combination of the method name and the parameter list
int num1, int num2 - parameter list
Methods 1
, num1 & num2 - formal parameters
variables defined in the method header
return result; - return value
x & y - actual parameters (arguments)
the value passed on to the parameter when a method is invoked
Calling Methods
// define the method
public static int max(int num1, int num2) {
int result;
if (num1>num2) {
result = num1;
} else {
result = num2
}
return result;
}
public static void main (String[] args) {
int i = 5;
int j = 2;
int k = max(i, j)
System.out.println("The maximum between " + i + " and " + j + " is " + k);
}
this program takes the integer values of i and j and puts them through the max
method,
caution:
// section a
public static int sign(int n) {
if (n > 0) {
return 1;
} else if (n == 0) {
return 0;
} else if (n < 0) {
return -1;
}
}
Methods 2
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