Oop lab/example codes - ประวัติรุ่นแก้ไข

Jittat เมื่อ 07:32, 10 พฤศจิกายน 2560

2017-11-10T07:32:50Z

Jittat: /* static variables (class variables) และ static method */

2017-11-10T02:23:05Z

static variables (class variables) และ static method

Jittat: /* static variables (class variables) และ static method */

2017-11-10T02:15:53Z

static variables (class variables) และ static method

Jittat เมื่อ 02:13, 10 พฤศจิกายน 2560

2017-11-10T02:13:26Z

Jittat: /* static variables (class variables) และ static method */

2017-11-10T02:12:44Z

static variables (class variables) และ static method

Jittat: หน้าที่ถูกสร้างด้วย '== class และ instance variables == public class Dog { private int weight; private double speed; ...'

2017-11-10T02:08:55Z

หน้าที่ถูกสร้างด้วย '== class และ instance variables == <syntaxhighlight lang="java"> public class Dog { private int weight; private double speed; ...'

หน้าใหม่

== class และ instance variables ==
<syntaxhighlight lang="java">
public class Dog {
private int weight;
private double speed;
private String name;

Dog(String n, int w, double speed) {
name = n;
weight = w;
this.speed = speed;
}

public void sayHello() {
System.out.println("Hello, my name is " + name);
}

public String getName() {
return name;
}

public double getSpeed() {
return speed;
}

public double runDuration(double distance) {
return distance / speed;
}

public double weightOnMoon() {
return ((double)(weight)) / 6.0;
}

public static void main(String[] args) {
Dog d = new Dog("Dang",15, 4.5);

d.sayHello();
System.out.println("It takes " + d.getName() +
" " + d.runDuration(100) +
" seconds.");
System.out.println("In the moon, " + d.getName() +
" weights " + d.weightOnMoon());
}
}
</syntaxhighlight>

== static variables (class variables) และ static method ==
<syntaxhighlight lang="java">
</syntaxhighlight>

@@ แถว 25: / แถว 25: @@
      public double runDuration(double distance) {
-         return distance / speed;
+         return distance / getSpeed();
+     }
@@ แถว 94: / แถว 94: @@
      @Override
-     public double runDuration(double distance) {
+     public double getSpeed() {
-         double dur = super.runDuration(distance);
+         double s = super.getSpeed();
          if(isUpgraded) {
-             return dur / 2;
+             return s * 2;
          } else {
-             return dur;
+             return s;
+         }
+     }

@@ แถว 75: / แถว 75: @@
          System.out.println(d.getName() + " has to pay " + d.getFoodPrice());
+     }
 </syntaxhighlight>

@@ แถว 2: / แถว 2: @@
 <syntaxhighlight lang="java">
 public class Dog {
-	private int weight;
+    private int weight;
-	private double speed;
+    private double speed;
-	private String name;
+    private String name;
-−
-	Dog(String n, int w, double speed) {
+    Dog(String n, int w, double speed) {
-		name = n;
+        name = n;
-		weight = w;
+        weight = w;
-		this.speed = speed;
+        this.speed = speed;
-−
+    }
-	public void sayHello() {
+    public void sayHello() {
-		System.out.println("Hello, my name is " + name);
+        System.out.println("Hello, my name is " + name);
-−
+    }
-−
-	public String getName() {
+    public String getName() {
-		return name;
+        return name;
-−
+    }
-−
-	public double getSpeed() {
+    public double getSpeed() {
-		return speed;
+        return speed;
-−
+    }
-−
-	public double runDuration(double distance) {
+    public double runDuration(double distance) {
-		return distance / speed;
+        return distance / speed;
-−
+    }
-−
-	public double weightOnMoon() {
+    public double weightOnMoon() {
-		return ((double)(weight)) / 6.0;
+        return ((double)(weight)) / 6.0;
-−
+    }
-	public static void main(String[] args) {
+    public static void main(String[] args) {
-		Dog d = new Dog("Dang",15, 4.5);
+        Dog d = new Dog("Dang",15, 4.5);
-−
-		d.sayHello();
+        d.sayHello();
-		System.out.println("It takes " + d.getName() +
+        System.out.println("It takes " + d.getName() +
-				" " + d.runDuration(100) +
+                " " + d.runDuration(100) +
-				" seconds.");
+                " seconds.");
-		System.out.println("In the moon, " + d.getName() +
+        System.out.println("In the moon, " + d.getName() +
-				" weights " + d.weightOnMoon());
+                " weights " + d.weightOnMoon());
-−
+    }
+}
 </syntaxhighlight>
@@ แถว 48: / แถว 48: @@
 <syntaxhighlight lang="java">
 public class Dog {
-	private int weight;
+    private int weight;
-	private double speed;
+    private double speed;
-	private String name;
+    private String name;
-	// ....
+    // ....
-	static double foodPriceRate;
+    static double foodPriceRate;
-−
-	public static double getFoodPriceRate() { return foodPriceRate; }
+    public static double getFoodPriceRate() { return foodPriceRate; }
-	public static void setFoodPriceRate(double rate) { foodPriceRate = rate; }
+    public static void setFoodPriceRate(double rate) { foodPriceRate = rate; }
-	public double getFoodPrice() {
+    public double getFoodPrice() {
-		return weight * foodPriceRate;
+        return weight * foodPriceRate;
-−
+    }
+}
 </syntaxhighlight>