Vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Definite Loop | You know exactly how many times you want to perform a particular task.
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| Indefinite Loop | You do not know in advance how many times you want to perform a particular task.
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| Fencepost Loop | We print "n" numbers, but only need n-1 commas. Add a statement outside the loop to place the initial post.
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| While Loop | Repeatedly executes it's body as long as the logical test is true.
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| Until Valid Data Loops | Repeatedly prompts the user for input until valid data is entered.
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| Sentinel Loops | repeats until a sentinel value is seen. (enter -1 to quit) --> -1=sentinel value
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| Priming Reed | Setting a variable to a value before a while loop/sentinel loop.
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| Pseudorandom Numbers | Numbers that mimic the properties of numbers chosen at random, though they are actually derived from a mathematical expression.
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| Random class | Random name = new Random();
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| Do/While Loops | Performs its test at the end of each repetition; do {statement;} while (test);
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| Creating File Objects | To allow access to a file;
File name = new File("filename");
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| To Read Files via Scanner | File name1 = new File("filename");
Scanner name2 = new Scanner(name1);
OR
Scanner name2 = new Scanner(new File("filename"));
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| Exception | An object representing a runtime error.
FileNotFound= file doesn't exist in the program.
InputMismatch= read wrong type of token.
NoSuchElement= read past the end of file input.
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| Reading Files | scannername.next();
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| PrintStream | An object in the java.io package that lets you print output to a destination (file).
PrintStream = new PrintStream(newFile("filename"));
DO NOT use the same file for output and reading.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
jamiechristian11
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