java/examples/Basics/Objects/MultipleConstructors/MultipleConstructors.pde

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+/**
+ * Multiple constructors
+ * 
+ * A class can have multiple constructors that assign the fields in different ways. 
+ * Sometimes it's beneficial to specify every aspect of an object's data by assigning 
+ * parameters to the fields, but other times it might be appropriate to define only 
+ * one or a few.
+ */
+
+Spot sp1, sp2;
+void setup() 
+{
+  size(200, 200);
+  background(204);
+  smooth();
+  noLoop();
+  // Run the constructor without parameters
+  sp1 = new Spot();
+  // Run the constructor with three parameters
+  sp2 = new Spot(122, 100, 40);
+}
+
+void draw() {
+  sp1.display();
+  sp2.display();
+}
+
+class Spot {
+  float x, y, radius;
+  // First version of the Spot constructor;
+  // the fields are assigned default values
+  Spot() {
+    x = 66;
+    y = 100;
+    radius = 16;
+  }
+  // Second version of the Spot constructor;
+  // the fields are assigned with parameters
+  Spot(float xpos, float ypos, float r) {
+    x = xpos;
+    y = ypos;
+    radius = r;
+  }
+  void display() {
+    ellipse(x, y, radius*2, radius*2);
+  }
+}

java/examples/Basics/Objects/MultipleConstructors/applet/MultipleConstructors.java

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+import processing.core.*; 
+
+import java.applet.*; 
+import java.awt.*; 
+import java.awt.image.*; 
+import java.awt.event.*; 
+import java.io.*; 
+import java.net.*; 
+import java.text.*; 
+import java.util.*; 
+import java.util.zip.*; 
+import java.util.regex.*; 
+
+public class MultipleConstructors extends PApplet {
+
+/**
+ * Multiple constructors
+ * 
+ * A class can have multiple constructors that assign the fields in different ways. 
+ * Sometimes it's beneficial to specify every aspect of an object's data by assigning 
+ * parameters to the fields, but other times it might be appropriate to define only 
+ * one or a few.
+ */
+
+Spot sp1, sp2;
+public void setup() 
+{
+  size(200, 200);
+  background(204);
+  smooth();
+  noLoop();
+  // Run the constructor without parameters
+  sp1 = new Spot();
+  // Run the constructor with three parameters
+  sp2 = new Spot(122, 100, 40);
+}
+
+public void draw() {
+  sp1.display();
+  sp2.display();
+}
+
+class Spot {
+  float x, y, radius;
+  // First version of the Spot constructor;
+  // the fields are assigned default values
+  Spot() {
+    x = 66;
+    y = 100;
+    radius = 16;
+  }
+  // Second version of the Spot constructor;
+  // the fields are assigned with parameters
+  Spot(float xpos, float ypos, float r) {
+    x = xpos;
+    y = ypos;
+    radius = r;
+  }
+  public void display() {
+    ellipse(x, y, radius*2, radius*2);
+  }
+}
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "MultipleConstructors" });
+  }
+}

java/examples/Basics/Objects/MultipleConstructors/applet/MultipleConstructors.pde

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+/**
+ * Multiple constructors
+ * 
+ * A class can have multiple constructors that assign the fields in different ways. 
+ * Sometimes it's beneficial to specify every aspect of an object's data by assigning 
+ * parameters to the fields, but other times it might be appropriate to define only 
+ * one or a few.
+ */
+
+Spot sp1, sp2;
+void setup() 
+{
+  size(200, 200);
+  background(204);
+  smooth();
+  noLoop();
+  // Run the constructor without parameters
+  sp1 = new Spot();
+  // Run the constructor with three parameters
+  sp2 = new Spot(122, 100, 40);
+}
+
+void draw() {
+  sp1.display();
+  sp2.display();
+}
+
+class Spot {
+  float x, y, radius;
+  // First version of the Spot constructor;
+  // the fields are assigned default values
+  Spot() {
+    x = 66;
+    y = 100;
+    radius = 16;
+  }
+  // Second version of the Spot constructor;
+  // the fields are assigned with parameters
+  Spot(float xpos, float ypos, float r) {
+    x = xpos;
+    y = ypos;
+    radius = r;
+  }
+  void display() {
+    ellipse(x, y, radius*2, radius*2);
+  }
+}