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33 Cards in this Set
- Front
- Back
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Java is _________ to Java Bytecode, not ______.
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compiled, interpreted
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___________ is interpreted when the program runs
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Bytecode
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________ is interpreted, so it translates as it runs
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Python
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_________ _________ _________ is a library of code that you can use in Java programs
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Java Application Programming Interface
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________ are types already built into Java and they turn purple in JGRASP.
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Primitives
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What are integer types in the order of their size?
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Byte, short, int, long
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What are floating types in the order of size?
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float, double
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Variables must start with a _________
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letter, $, or underscore
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After the first letter, a character name can be
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a number, letter, $, or underscore
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_______ are indicated by single quotes
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characters
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Each character maps to a number between __ and ___
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0 and 255
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What does 'a' correspond to?
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97
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What does 'A' correspond to?
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65
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What does '0' correspond to?
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48
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What is the order of operation for arithmetic?
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- ()
- -(negative) - *, / , % - + , - - = |
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_ gives you the remainder when dividing two numbers
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%
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How would you find the ones digit and the tens digit of a number respectively?
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ones digit: mod by 10
tens digit: divide by 10 then mod by 10 |
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Objects are _________ of classes
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instantiations
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You can call _______ on objects
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Methods
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Java saves the ______ in memory of where the Object's data is
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location
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The _____ and the _______ class provide static methods that you can call with the class name. You cannot instantiate them.
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Math, Character
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Strings are _____, not primitive types. They can be indicated by _______ ________
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objects;
double quotes |
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What are methods of Strings?
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String.charAt()
String.length() String.toUpperCase() String.toLowerCase() String.substring() |
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What are the escape characters?
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\t new tab
\n new line \\ |
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If you need to compare Strings never use _____. What should you use instead?
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==
if (s1.equals(s2)) System.out.println("They are the same") |
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What should you put to convert a String to a double or an int?
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Double.parseDouble("32.5")
Integer.parseInt("5") |
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What should you do to convert a number to a string
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int a = 7
String s = a + "" ; |
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How do you initialize a scanner?
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Scanner kb = new Scanner(System.in)
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What are some methods of scanner?
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s.hasNext()
s.nextInt() s.next() s.nextDouble() s.next().charAt(0) |
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_______ command allows you to format a print statement in very specific ways
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printf
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What are some imports you would do?
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import java.util.Scanner
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What are the class imports?
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public class Myclass {
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What are the main method line?
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public static void main(String[] args)
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