Initial

2024-08-07 09:16:27 -04:00
parent fdfadd5c7e
commit 5f971cf684
5200 changed files with 731717 additions and 0 deletions
--- a/java/CASHFLOW/Applet1.java
+++ b/java/CASHFLOW/Applet1.java
@@ -0,0 +1,116 @@
+import java.awt.*;
+import java.applet.*;
+
+/**
+ * This class reads PARAM tags from its HTML host page and sets
+ * the color and label properties of the applet. Program execution
+ * begins with the init() method. 
+ */
+public class Applet1 extends Applet
+{
+	/**
+	 * The entry point for the applet. 
+	 */
+	public void init()
+	{
+		initForm();
+
+		usePageParams();
+
+		// TODO: Add any constructor code after initForm call.
+	}
+
+	private	final String labelParam = "label";
+	private	final String backgroundParam = "background";
+	private	final String foregroundParam = "foreground";
+
+	/**
+	 * Reads parameters from the applet's HTML host and sets applet
+	 * properties.
+	 */
+	private void usePageParams()
+	{
+		final String defaultLabel = "Default label";
+		final String defaultBackground = "C0C0C0";
+		final String defaultForeground = "000000";
+		String labelValue;
+		String backgroundValue;
+		String foregroundValue;
+
+		/** 
+		 * Read the <PARAM NAME="label" VALUE="some string">,
+		 * <PARAM NAME="background" VALUE="rrggbb">,
+		 * and <PARAM NAME="foreground" VALUE="rrggbb"> tags from
+		 * the applet's HTML host.
+		 */
+		labelValue = getParameter(labelParam);
+		backgroundValue = getParameter(backgroundParam);
+		foregroundValue = getParameter(foregroundParam);
+
+		if ((labelValue == null) || (backgroundValue == null) ||
+			(foregroundValue == null))
+		{
+			/**
+			 * There was something wrong with the HTML host tags.
+			 * Generate default values.
+			 */
+			labelValue = defaultLabel;
+			backgroundValue = defaultBackground;
+			foregroundValue = defaultForeground;
+		}
+
+		/**
+		 * Set the applet's string label, background color, and
+		 * foreground colors.
+		 */
+		label1.setText(labelValue);
+		label1.setBackground(stringToColor(backgroundValue));
+		label1.setForeground(stringToColor(foregroundValue));
+		this.setBackground(stringToColor(backgroundValue));
+		this.setForeground(stringToColor(foregroundValue));
+	}
+
+	/**
+	 * Converts a string formatted as "rrggbb" to an awt.Color object
+	 */
+	private Color stringToColor(String paramValue)
+	{
+		int red;
+		int green;
+		int blue;
+
+		red = (Integer.decode("0x" + paramValue.substring(0,2))).intValue();
+		green = (Integer.decode("0x" + paramValue.substring(2,4))).intValue();
+		blue = (Integer.decode("0x" + paramValue.substring(4,6))).intValue();
+
+		return new Color(red,green,blue);
+	}
+
+	/**
+	 * External interface used by design tools to show properties of an applet.
+	 */
+	public String[][] getParameterInfo()
+	{
+		String[][] info =
+		{
+			{ labelParam, "String", "Label string to be displayed" },
+			{ backgroundParam, "String", "Background color, format \"rrggbb\"" },
+			{ foregroundParam, "String", "Foreground color, format \"rrggbb\"" },
+		};
+		return info;
+	}
+
+	Label label1 = new Label();
+
+	/**
+	 * Intializes values for the applet and its components
+	 */
+	void initForm()
+	{
+		this.setBackground(Color.lightGray);
+		this.setForeground(Color.black);
+		label1.setText("label1");
+		this.setLayout(new BorderLayout());
+		this.add("North",label1);
+	}
+}