Data commit

Task/Write-float-arrays-to-a-text-file/Java/write-float-arrays-to-a-text-file.java

@@ -0,0 +1,33 @@
+import java.io.*;
+
+public class FloatArray {
+    public static void writeDat(String filename, double[] x, double[] y,
+                                int xprecision, int yprecision)
+        throws IOException {
+        assert x.length == y.length;
+        PrintWriter out = new PrintWriter(filename);
+        for (int i = 0; i < x.length; i++)
+            out.printf("%."+xprecision+"g\t%."+yprecision+"g\n", x[i], y[i]);
+        out.close();
+    }
+
+    public static void main(String[] args) {
+        double[] x = {1, 2, 3, 1e11};
+        double[] y = new double[x.length];
+        for (int i = 0; i < x.length; i++)
+            y[i] = Math.sqrt(x[i]);
+
+        try {
+            writeDat("sqrt.dat", x, y, 3, 5);
+        } catch (IOException e) {
+            System.err.println("writeDat: exception: "+e);
+        }
+
+        try {
+            BufferedReader br = new BufferedReader(new FileReader("sqrt.dat"));
+            String line;
+            while ((line = br.readLine()) != null)
+                System.out.println(line);
+        } catch (IOException e) { }
+    }
+}