{"id":9290,"date":"2022-09-18T05:32:40","date_gmt":"2022-09-18T00:02:40","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-read-txt-file-and-use-the-double-values-in-it\/"},"modified":"2022-09-18T05:32:40","modified_gmt":"2022-09-18T00:02:40","slug":"solved-how-to-read-txt-file-and-use-the-double-values-in-it","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-read-txt-file-and-use-the-double-values-in-it\/","title":{"rendered":"[Solved] How to read txt file, and use the double values in it?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-41057818\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"41057818\" data-parentid=\"41041986\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>You can try that code <\/p>\n<pre><code>import java.io.File;\nimport java.io.FileInputStream;\nimport java.io.FileNotFoundException;\nimport java.util.ArrayList;\nimport java.util.List;\nimport java.util.Scanner;\n\npublic class MainActivity extends AppCompatActivity {\n\n    AudioAnalyzer aa = new AudioAnalyzer();\n    TextView textView;\n\n    @Override\n    protected void onCreate(Bundle savedInstanceState) {\n        super.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_main);\n        textView = (TextView) findViewById(R.id.textView);\n    }\n\n    public void analyzer (View view) throws FileNotFoundException{\n        try {\n            double[] input = readFile(\"\/storage\/sdcard\/input.txt\");\n            double[] analyzed = readFile(\"\/storage\/sdcard\/bandpass.txt\");\n\n            isWorking(aa.analyze(input, analyzed));\n        catch (IOException e) {\n                e.printStackTrace();\n        }\n\n    }\n    private void isWorking(boolean working){\n        if(working)\n            textView.setText(\"The filter works!\");\n        else\n            textView.setText(\"Try again. The filter does not work!\");           \n    }\n    public double[] readFile(String fname) throws FileNotFoundException {\n\n\n    File file = new File(fname); \n        Scanner scanner = new Scanner(new FileInputStream(file));\n        List&lt;Double&gt; collection = new ArrayList&lt;Double&gt;();\n\n        while (scanner.hasNextDouble()){\n            double number = scanner.nextDouble();\n            collection.add(number);\n        }\n\n        scanner.close();\n        return toPrimitive(collection.toArray(new Double[collection.size()]));\n    }   \n    public double[] toPrimitive(Double[] array) {\n        if (array == null) {\n            return null;\n        } else if (array.length == 0) {\n            return null;\n        }\n        final double[] result = new double[array.length];\n        for (int i = 0; i &lt; array.length; i++) {\n            result[i] = array[i].doubleValue();\n        }\n        return result;\n    }\n}\n<\/code><\/pre>\n<p>Analyzer<\/p>\n<pre><code>public class AudioAnalyzer {\n    private IIRFilter bandpass, lowpass;\n    final double[] b1 = {0.0286, 0, -0.0859, 0, 0.0859, 0, -0.0286}; \n    final double[] a1 = {-3.9320, 6.8170, -6.7455, 4.0453, -1.3889, 0.2120};\n\n    public AudioAnalyzer() {\n        bandpass = new IIRFilter(b1, a1);\n    }\n\n    public boolean analyze(double[] inputFilter, double[] outputFilter) {\n        int i;\n        double g1[] = new double[inputFilter.length];\n\n        for (i = 0; i &lt; inputFilter.length; i++) {\n            double f1 = inputFilter[i];\n            g1[i] = outputFilter[i]-(bandpass.filter(f1));\n\n        for (i = 0; i &lt; g1.length; i++){\n            if (( g1[i]-outputFilter[i] != 0))\n                return false;\n        }\n\n\n         return true;\n     }\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">6<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to read txt file, and use the double values in it? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You can try that code import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class MainActivity extends AppCompatActivity { AudioAnalyzer aa = new AudioAnalyzer(); TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.textView); } public void analyzer (View view) throws FileNotFoundException{ try { double[] input &#8230; <a title=\"[Solved] How to read txt file, and use the double values in it?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-read-txt-file-and-use-the-double-values-in-it\/\" aria-label=\"More on [Solved] How to read txt file, and use the double values in it?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,323,1154],"class_list":["post-9290","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-java","tag-text-files"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to read txt file, and use the double values in it? - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-read-txt-file-and-use-the-double-values-in-it\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to read txt file, and use the double values in it? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You can try that code import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class MainActivity extends AppCompatActivity { AudioAnalyzer aa = new AudioAnalyzer(); TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.textView); } public void analyzer (View view) throws FileNotFoundException{ try { double[] input ... 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