Contents: Control Structures
• Decision
Using if and if...else
Nested if Statements
Shortcut if Statements
Using switch Statements
• Repetition
Looping: for, while, and do
Nested loops
Using break and continue
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Control Structures - Java Programming Language - Lecture Slides, Slides of Computer Science
These are the Lecture Slides of Java Programming Language which includes Applet Class, Passing Parameters to Applets, Conversions, Applications and Applets, Running a Program, Applet, Application, Mouse Event, Keyboard Event etc. Key important points are: Control Structures, Decision, Nested If Statements, Shortcut If Statements, Repetition, Looping, Nested Loops, Using Break and Continue, Statements, Shortcut
Typology: Slides
2012/2013
1 / 20
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Contents: Control Structures
- Decision Using if and if...else Nested if Statements Shortcut if Statements Using switch Statements
- Repetition Looping: for, while, and do Nested loops Using break and continue
Decisions
if Statements
switch Statements
Shortcut if Statements
The if...else Statement
- Format: if (booleanExpression) { statement(s)-for-the-true-case; } else { statement(s)-for-the-false-case; }
if...else Example
if (radius >= 0) { area = radiusradiusPI; System.out.println("The area for the circle of radius " + radius + " is " + area); } else { System.out.println("Negative input"); }
Shortcut if Statements
if (x > 0) y = 1
else y = -1;
is equivalent to
y = (x > 0)? 1 : -1;
switch Statements
switch (year) { case 7: interestRate = 7.25; break; case 15: interestRate = 8.50; break; case 30: interestRate = 9.0; break; default: System.out.println( "Wrong Year, enter 7, 15, or 30"); }
Repetitions
for Loops while Loops do Loops break and continue
for Loops
- Format: for (control-variable-initializer; continue-condition; adjustment-statement) { //loop body; }
- Example: int i; for (i = 0; i<100; i++) { System.out.println("Welcome to Java!” + i); } // for (int i = 0; i<100; i++)
for Loop Examples
Examples for using the for loop: Example 3.2: TestSum.java TestSum TestMulTable Example 3.3: TestMulTable.java Run Run
while Loops
- Format: while (continue-condition) { // loop-body; }
- Example 3.4: TestWhile.java TestWhile Run
do Loops
- Format:
do
//loop body;
} while (continue-condition)
do Loop Flow Chart
false true Statement(s) Next Statement Continue condition?
The continue Keyword
false true Statement(s) Next Statement Continue condition? Statement(s) continue
Using break and continue
Examples for using the break and continue keywords: Example 3.5: TestBreak.java Example 3.6: TestContinue.java TestBreak TestContinue Run Run