[Ch3] Code samples from throughout chapter, plus a quick test to see which...

package ch3;

class Dog {

  String name;

  public static void main(String[] args) {

    // make a Dog object and access it

    Dog dog1 = new Dog();

    dog1.bark();

    dog1.name = "Bart";

    // now make a Dog array

    Dog[] myDogs = new Dog[3];

    // and put some dogs in it

    myDogs[0] = new Dog();

    myDogs[1] = new Dog();

    myDogs[2] = dog1;

    // now access the Dogs using the array

    // references

    myDogs[0].name = "Fred";

    myDogs[1].name = "Marge";

    // Hmmmm... what is myDogs[2] name?

    System.out.print("last dog’s name is ");

    System.out.println(myDogs[2].name);

    // now loop through the array

    // and tell all dogs to bark

    int x = 0;

    while (x < myDogs.length) {

      myDogs[x].bark();

      x = x + 1;

    }

  }

  public void bark() {

    System.out.println(name + " says Ruff!");

  }

  public void eat() {

  }

  public void chaseCat() {

  }

}

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package ch3;

public class ExampleDeclarations {

  void declarations() {

    int x;

    x = 234;

    byte b = 89;

    boolean isFun = true;

    double d = 3456.98;

    char c = 'f';

    int z = x;

    boolean isPunkRock;

    isPunkRock = false;

    boolean powerOn;

    powerOn = isFun;

    long big = 3456789L;

    float f = 32.5f;

  }

  void declareLiterals() {

    int x = 234;

    int size = 32;

    char initial = 'j';

    double d = 456.709;

    boolean isLearning;

    isLearning = true;

    int y = x + 456;

  }

  void invalidNames() {

//    int _;

//    int abstract;

//    int assert;

//    int boolean;

//    int break;

//    int byte;

//    int case;

//    int catch;

//    int char;

//    int class;

//    int const;

//    int continue;

//    int default;

//    int do;

//    int   double;

//    int else;

//    int enum;

    int exports;

//    int extends;

//    int final;

//    int finally;

//    int float;

//    int for;

//    int goto;

//    int if;

//    int implements;

//    int import;

//    int instanceof;

//    int int;

//    int interface;

//    int long;

    int module;

//    int native;

//    int new;

//    int         non-sealed;

//    int null;

    int open;

    int opens;

//    int package;

    int permits;

//    int private;

//    int protected;

    int provides;

//    int public;

    int record;

    int requires;

//    int return;

    int sealed;

//    int short;

//    int static;

//    int strictfp;

//    int super;

//    int switch;

//    int synchronized;

//    int this;

//    int throw;

//    int throws;

    int to;

//    int transient;

    int transitive;

//    int try;

    int uses;

    int var;

//    int void;

//    int volatile;

//    int while;

    int with;

    int yield;

//    int false;

//    int true;

  }

}

package ch3;

public class Sharpen {

  void sharpen() {

//    int x = 34.5;

//    boolean boo = x;

    int g = 17;

    int y = g;

    y = y + 10;

    short s;

//    s = y;

    byte b = 3;

    byte v = b;

    short n = 12;

//    v = n;

//    byte k = 128;

  }

}