java

[Solved] How to read txt file, and use the double values in it?

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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 = … Read more

[Solved] How to avoid using volatile in Java

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I have to use volatile to guarantee the value is always read from main memory That is not how volatile work. volatile is used to build a happens-before relation ship: This means that changes to a volatile variable are always visible to other threads. What’s more, it also means that when a thread reads a … Read more

[Solved] How did fetch records inserted on exactly on 15th day before from current date in mysql [closed]

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after couple of hours i got my solution…thanks for your support..its works perfectly for me … SELECT * FROM table_name WHERE STR_TO_DATE(created_datetime, ‘%d/%m/%Y’) BETWEEN DATE_SUB(CURDATE(), INTERVAL 15 DAY) AND DATE_SUB(CURDATE(), INTERVAL 15 DAY) solved How did fetch records inserted on exactly on 15th day before from current date in mysql [closed]

[Solved] How do I display the actual input instead of option number? [closed]

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You’ve already generated a random number here: new Random().nextInt(names.length) You can use this random number to access an element in the names array. int randomNumber = new Random().nextInt(names.length); String option = names[randomNumber]; // here is the important bit! Now you can print option out! System.out.println(“You are going to eat ” + option); 0 solved How … Read more

[Solved] Build a list of the names of students currently enrolled in a number of units strictly greater than the unitThreshold

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If I’m understanding you correctly, you’re supposed to get a list of students who are enrolled in >= unitThreshold number of units? If so, this should help: for (String studentName : courseListsByStudentName.keySet()) { int units = 0; List<Course> courses = courseListsByStudentName.get(studentName); for (Course course : courses) { units += course.getNumUnits(); } if (units > unitThreshold) … Read more

[Solved] Reverse a singly linked list in Java

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There are 2 problems: you are not saving the new head once it is returned (when you reach the end of the list), so the returned head is always going to be the one of the first stack of recursion, which is the original first node; you are not assigning node.next to null on the … Read more

[Solved] Check for improper angle bracket usage (not in tags) in inline Javadoc in IntelliJ IDEA

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According to Serge Baranov from JetBrain’s support team: It’s a known limitation, please vote for https://youtrack.jetbrains.com/v2/issue/IDEA-165488. The issue’s description reads as expected: Idea’s ‘HTML problems in Javadoc (DocLint)’ does not report any problems in the following javadoc: /** * a < b > c */ void test(); However, javadoc generation will fail in this case: … Read more