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In order to place stack trace into a String in Java, we use the java.io.StringWriter and java.io.PrintWriter classes. In a catch block, after catching the exception, we print the stack trace by printStackTrace() method and write it into the writer and then use the ToString() method to convert it into a String.Let us see a program to place the stack trace into a String in Java.Example Live Demoimport java.io.PrintWriter; import java.io.StringWriter; public class Example { public static void main(String[] args) { try{ int ans = 10/0; }catch (ArithmeticException ex) { ... Read More
The java.lang.Math class has an abs() method which facilitates us to find the absolute values of different data types.Absolute value of floatIn order to compute the absolute value of a float value, we use the java.lang.Math.abs(float a) method. If the argument ‘a’ is negative, the negation of ‘a’ is returned. If the argument ‘a’ is non-negative, the argument itself is returned. When the argument is positive zero or negative zero, the result is positive zero. In case the argument is infinite, the result is positive infinity. If the argument is NaN, the result is NaN.Declaration − The declaration of Math.abs(float ... Read More
In order to get the ceiling value of a number in Java, we use the java.lang.Math.ceil() method. The Math.ceil() method returns the smallest (closest to negative infinity) double value which is greater than or equal to the parameter and has a value which is equal to a mathematical integer on the number line. If the parameter is NaN or an infinity or positive zero or negative zero, then the result is the same as the argument. If the argument value is less than zero but greater than -1.0, then the value returned is negative zero.Declaration − The java.lang.Math.ceil() method is ... Read More
To get the exponential value of a number in Java, we use the java.lang.Math.exp() method. The Math.exp() returns a double value which is the Euler’s number e raised to the power of the argument. If the parameter is NaN, the result obtained is NaN. If the argument is positive infinity, then the result is positive infinity. In case the argument is negative infinity, then the output is positive zero.Declaration − The java.lang.Math.exp() method is declared as follows:public static double exp(double a)where a is the number representing the power to which e is raised to.Let us see a program to get ... Read More
We can enable the MySQL slow query log with the help of SET statement.The following is the syntax.SET GLOBAL slow_query_log = 'Value';In the above syntax, value can be filled with ON/OFF. To enable slow query log, let us see the query.mysql> SET GLOBAL slow_query_log = 'ON'; Query OK, 0 rows affected (0.00 sec)To check if the slow query is ON, implement the following query −mysql> SHOW GLOBAL VARIABLES LIKE 'slow\_%'; Here is the output.+---------------------+--------------------------+ | Variable_name | Value | +---------------------+--------------------------+ | slow_launch_time | 2 ... Read More
This example demonstrate about How to print number of paragraphs in textview in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken textview to show paragraph and toast will show the information about number of paragraphs.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { TextView ... Read More
In this section, we will see how we can use the Zilog Z-80 Microprocessor to move a block of data to another location. There is one assumption, there is sufficient distance between source and destination. So blocks are non-overlapping. Basically the block movement is not exact moving, it is copying the data to other locations.The number of items in the block is given at location 5000H, and the block is located at position 5050H.So before movement, the items in the memory is looking like this.AddressValue5000H04H...5050H89H5051H7AH5052H2FH5053H56H...Now, we are writing a program at location 8000H to move the block contents to other ... Read More
This example demonstrate about How to print integer array in android Log.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml In the code, we have taken listview to show integer arrayStep 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; public class MainActivity extends AppCompatActivity { ListView list; ... Read More
Error-detecting codes are a sequence of numbers generated by specific procedures for detecting errors in data that has been transmitted over computer networks.When bits are transmitted over the computer network, they are subject to get corrupted due to interference and network problems. The corrupted bits leads to spurious data being received by the receiver and are called errors.Error – detecting codes ensures messages to be encoded before they are sent over noisy channels. The encoding is done in a manner so that the decoder at the receiving end can detect whether there are errors in the incoming signal with high ... Read More
To create a table with InnoDB engine, we can use the ENGINE command. Here is the query to create a table.mysql> create table EmployeeRecords - > ( - > EmpId int, - > EmpName varchar(100), - > EmpAge int, - > EmpSalary float - > )ENGINE=INNODB; Query OK, 0 rows affected (0.46 sec)We have set the ENGINE as INNODB above.Check the full description about the table using the DESC command.mysql> DESC EmployeeRecords;The following is the output.+-----------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------+--------------+------+-----+---------+-------+ | EmpId ... Read More