Create JSoupValidateAndSum.java

janbodnar · web-flow · commit ecb967e75dab · 2020-01-19T13:03:03.000+01:00
diff --git a/JSoupValidateAndSum.java b/JSoupValidateAndSum.java
@@ -0,0 +1,52 @@
+package com.zetcode;
+
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+
+import java.io.IOException;
+
+// the program reads data from a web page, validates it and 
+// calculates sum from them
+// uses custom validation method
+
+public class JSoupValidateAndSum {
+
+    public static void main(String[] args) throws IOException {
+
+        String url = "http://test.webcode.me/data.txt";
+
+        Document doc = Jsoup.connect(url).get();
+
+        String content = doc.body().text();
+        System.out.println(content);
+
+        String[] vals = content.split(",\\s+");
+
+        int sum = 0;
+
+        for (String val : vals) {
+
+            if (isNumeric(val)) {
+
+                sum += Integer.parseInt(val);
+            }
+        }
+
+        System.out.println(sum);
+    }
+
+    public static boolean isNumeric(String val) {
+
+        int len = val.length();
+
+        for (int i = 0; i < len; i++) {
+
+            if (!Character.isDigit(val.charAt(i))) {
+
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
