initial commit

src/lab1/Birds.java

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+package lab1;
+
+/**
+ * Birds demos concatonation.
+ * @author Braeden Sowinski
+ * @version 1.0.0
+ */
+public class Birds {
+
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        // defining these as constants due to checkstyle :(
+        final int ten = 10;
+        final int three = 3;
+        System.out.println("Ten robins plus " 
+                + (ten + three)
+                + " canaries is 23 birds."
+        );
+    }
+}

src/lab1/Count.java

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+package lab1;
+
+/**
+* This program prints out 1 to 5 in three languages.
+* @author = Braeden Sowinski
+* @version = 1.0.0
+*/
+public class Count {
+
+    // below is a javadoc comment, its different from multi line by
+    // starting with two stars
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        // Here is 1 to 5 in English
+        System.out.println("One, two, three, four, five.");
+        
+        // Here is 1 to 5 in French
+        System.out.println("Un, deux, trois, quatre, cinq.");
+        
+        // Here is 1 to 5 in Spanish
+        System.out.println("Uno, dos, tres, cuatro, cinco");
+    }
+}
+
+// removing one slash from the beginning of the comment makes it invalid
+// adding slashes after the first two initial slashes is ok. they are ignored
+
+/*
+ * this is a multi-line comment
+ */

src/lab1/Hello.java

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+package lab1;
+
+/**
+ * Prints hello world message.
+ * @author Braeden Sowinski
+ * @version 1.0.0
+ * */
+public class Hello {
+    
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+}
+
+/*
+ *  After changing the classname to "helo", the error is:
+ *      Error: Could not find or load main class lab1.Hello in module lab0
+ *      
+ *  Changing the text inside of the println function produces no errors and 
+ *  simply outputs "Helo World!" as intended.
+ *  
+ *  Removing the final quotation produces the error: 
+ *      String literal is not properly closed by a double-quote
+ *      
+ *  Removing the first quotation produces the error:
+ *      Syntax error on token(s), misplaced construct(s)
+ *      Syntax error on token "!", ; expected
+ *      String literal is not properly closed by a double-quote
+ *  
+ *  Forgetting a semi-colon at the end of a line of code will produce a 
+ *  syntax error: 
+ *      "Syntax error, insert ";" to complete BlockStatements"
+ *      
+ */

src/lab1/Plus.java

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+package lab1;
+
+/**
+* Plus demonstrates the different behaviours of the + operator.
+* @author Braeden Sowinski
+* @version 1.0.0
+*/
+public class Plus {
+    /**
+    * main program entry.
+    * @param args unused
+    */
+    public static void main(String[] args) {
+        System.out.println("This is a long string that is the"
+                + " concatenation of two shorter strings.");
+
+        final int years = 70;
+        
+        System.out.println("The first computer was invented about " 
+                + years + " years ago");
+        
+        final int num1 = 8;
+        final int num2 = 5;
+        System.out.println("8 plus 5 is " + num1 + num2);
+        System.out.println("8 plus 5 is " + (num1 + num2));
+        System.out.println(num1 + num2 + " equals 8 plus 5.");
+    }
+}

src/lab1/Poem.java

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+package lab1;
+
+/**
+ * Poem prints a poem.
+ * @author Braeden Sowinski
+ * @version 1.0.0
+ */
+public class Poem {
+    
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        System.out.println("Roses are red");
+        System.out.println("Violets are blue");
+        System.out.println("Sugar is sweet");
+        System.out.println("But I have commitment issues");
+        System.out.println("So I'd rather just be friends");
+        System.out.println("At this point in our relationship.");
+    }
+}

src/lab1/Problems.java

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+package lab1;
+
+/**
+ * Problems contains problems to fix.
+ * @author Braeden Sowinski
+ * @version 1.0.0
+ */
+public class Problems {
+
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        System.out.println("This program used to have lots ofproblems,");
+        System.out.println("but if it prints this, you fixed them all.");
+        System.out.println(" *** Hurray! ***");
+        System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+    }
+}
+
+// All problems have been fixed

src/lab1/Simple.java

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+package lab1;
+
+/**
+ * Simple talk about valid variable identifiers.
+ * @author Braeden Sowinski
+ * @version 1.0.0
+ */
+public class Simple {
+
+    /**
+     * main program entry.
+     * @param args unused
+     */
+    public static void main(String[] args) {
+        System.out.print("I love Java!\n");
+    }
+}
+
+/*
+ * simple        - invalid, cannot match class name
+ * SimpleProgram - valid
+ * 1_Simple      - invalid, cannot start with a number
+ * _simple_      - valid
+ * *Simple*      - invalid, contains invalid characters (*)
+ * $123_45       - valid
+ * Simple!       - invalid, contains an invalid character (!)
+ */