From 42352c373405e3503a42999c5998be61ea8a5e28 Mon Sep 17 00:00:00 2001
From: Dermi Malika <48280218+dermimalika@users.noreply.github.com>
Date: Mon, 4 Oct 2021 20:54:32 +0200
Subject: [PATCH] KNN ALGORITHM

---
 KNN.java | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 KNN.java

diff --git a/KNN.java b/KNN.java
new file mode 100644
index 000000000000..7577bb1986a6
--- /dev/null
+++ b/KNN.java
@@ -0,0 +1,43 @@
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+
+import weka.classifiers.Classifier;
+import weka.classifiers.lazy.IBk;
+import weka.core.Instance;
+import weka.core.Instances;
+
+public class KNN {
+    public static BufferedReader readDataFile(String filename) {
+        BufferedReader inputReader = null;
+
+        try {
+            inputReader = new BufferedReader(new FileReader(filename));
+        } catch (FileNotFoundException ex) {
+            System.err.println("File not found: " + filename);
+        }
+
+        return inputReader;
+    }
+
+    public static void main(String[] args) throws Exception {
+        BufferedReader datafile = readDataFile("data.txt");
+
+        Instances data = new Instances(datafile);
+        data.setClassIndex(data.numAttributes() - 1);
+
+        //do not use first and second
+        Instance first = data.instance(0);
+        Instance second = data.instance(1);
+        data.delete(0);
+        data.delete(1);
+
+        Classifier ibk = new IBk();
+        ibk.buildClassifier(data);
+
+        double class1 = ibk.classifyInstance(first);
+        double class2 = ibk.classifyInstance(second);
+
+        System.out.println("first: " + class1 + "\nsecond: " + class2);
+    }
+}
\ No newline at end of file