7.3. Worked Example: Writing Methods¶

Subgoals for Writing Methods

Define method header based on problem
Define return statement at the end
Define method body/logic
1. Determine types of logic (expression, selection, loop, etc)
2. Define internal variables
3. Write statements

Problem: Write a public method that does not return anything but accepts as parameters 2 Strings and prints out a cheerful sentence with the input in it.

SG1: Define method header based on problem

public void cheerful (String a, String b)

SG2: Define return statement at the end

the return; statement is optional for void return type.

public void cheerful (String a, String b)
{
   return;
}

SG3: Define method body/logic

Determine types of logic (expression, selection, loop, etc.)
Define internal variables
Write statements

The instructions require us to concatenate a String expression for printing. One variable to store the message could be useful.

public void cheerful (String a, String b)
{
   String message = a + " is happy clap your hands, " + b;
   System.out.println(messsage);
   return;
}

Practice Pages

7.3.1. WrMethods-WE3-P1