Join Peggy Fisher for an in-depth discussion in this video Solution: Hello world, part of Java Essential Training for Students.
- So how did you make out?…I hope you are able to compile and run your program…from the command line.…It's pretty cool, right?…Let's take a look at my solution.…Remember that your solution might be very different.…All programmers program a little bit differently.…We'll start with the code.…At the very top I had to remember…to import my Java.util.scanner.…Line two is where I can declare my class, name and age.…Line three I have my public static void main,…then I read in the value that the user entered…as the command line argument…into the variable called prompt.…
I use that value to print…that back out to the screen.…I know the users going to type in a string and an integer.…So I create a string for the name…and an integer for the age.…On line nine I create my new scanner object.…Scanner in = new Scanner (System.in).…Then I read in the name = in.nextLine…and I read in the age = in.nextInt.…I don't have to parse it since this is not coming…from the command line prompt.…This is actually inside the running program…and then I print out whatever the user entered.…
Author
Peggy Fisher
Released
6/29/2015- Getting started with parsing
- Reviewing data types
- Using decisions
- Creating user-defined methods
- Command-line debugging
- Exploring the Java API
- Creating and instantiating classes
- Working with interfaces
- Storing items with arrays
Skill Level Intermediate
Duration
Views
Q: How can I make my debugger function like the author’s?
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Introduction
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Welcome58s
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1. Command Level Programming
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Challenge: Hello world1m 8s
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Solution: Hello world2m 22s
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2. Basics Review
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Reviewing data types4m 32s
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Using decisions2m 37s
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Managing loops4m 36s
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Challenge: College cost app1m 12s
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Solution: College cost app4m 23s
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3. Debugging
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Setting breakpoints1m 42s
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Stepping through the code4m 37s
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Command line debugging3m 50s
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Solution: Debugging5m 25s
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4. Java API
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Exploring the Java API3m 2s
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Challenge: API51s
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Solution: API2m 16s
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5. Simulations and Algorithm Analysis
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Using simulations3m 24s
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Random number generator3m 5s
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Analyzing algorithms4m 49s
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Leveraging recursion1m 59s
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Challenge: Monte Carlo2m 1s
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Solution: Monte Carlo3m 2s
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6. Classes and Objects
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Diagramming with UML1m 42s
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Creating classes7m 4s
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Using encapsulation1m 28s
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Instantiating classes7m 16s
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Avoiding null references4m 27s
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Challenge: Kathie's Catering2m 53s
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Solution: Kathie's Catering4m 41s
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7. More on Classes
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Introducing inheritance6m 35s
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Working with interfaces4m 30s
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Using polymorphism2m 14s
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Solution: Pizza ordering app3m 51s
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8. Data Structures
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Storing items with arrays4m 15s
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Utilizing 2D arrays3m 3s
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Managing ArrayLists5m 33s
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Enhanced for Loop5m 9s
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Challenge: Name finder1m 8s
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Solution: Name finder3m 42s
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Conclusion
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Next steps34s
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Video: Solution: Hello world