In Java, Stack Trace is position of the exceptions. In other words, we can say that stack trace quest(trace) for the coming line where exception may raise. In this section, we will discuss Java Stack trace in detail. What’s stack trace?A Java stack trace is a textual representation of the stack trace for an exception. It shows the sequence of method calls that led up to the point where the exception occurred. Stack traces are very helpful for debugging because they provide information about the call stack at the time an exception was thrown, including the file names and line numbers where the methods were invoked.
The stack frames represent the movement of an operation during the prosecution of the program. It traces the locales where exception raised. It collects the information of all the styles that are invoked by a program. When we don’t watch about the un handled exceptions and the program throws the exceptions also Java stack trace prints the stack trace on the press by dereliction. The JVM automatically produces the stack trace when there is an exception. In stack trace, each element represents a system incantation.
After introducing Java1.5, the stack trace is reprised into an Array of a Java class called Stack Trace Element. The array returned by the get Stack Trace() system of the Throwable class. All stack frames denote the system incantation except for the first frame( at the top). The first frame denotes the prosecution point on which JVM generates the mound trace. The Stack Trace Element class has 4 arguments and creates a stack trace element that denotes the specified prosecution point.
public Stack Trace Element( String declaring Class, String method Name, String file Name, int line Number).
o declaring Class- the good name of the class that contains the prosecution point
o method Name- It represents the system name that contains the prosecution point.
o file Name- It represents the train name that contains the prosecution point.
o line Number- It represents the line number of the source of the prosecution point. It will fling the Null Pointer Exception if the parameters declaring Class and method Name are null. Let’s see the textual representation (syntax) of the stack trace.
Slicing of array in the Java
In Java as we know that the array slicing is a method to get the subarray of the given array. Lets consider there is a() is an array. It has 8 rudiments listed from a( 0) to a( 7). a() = { 8, 9, 4, 6, 0, 11, 45, 21}
Now, we want to find a slice of the array indicator from a( 3) to a( 6). Here the a( 3) is the starting Index and a( 6) is the end Index. Thus, we get the following sliced array a() = { 6, 0, 11, 45}. By Copying rudiments it’s a native system for getting a slice of an array. In this system, first, we find the launch and end indicator of the given array. After that, we produce an empty array( sliced array) of size( end Index- start Index).
From the given array, copy the rudiments( from start Index) to the sliced array. At last, publish the sliced array. Let us implement the below approach in the Java program where we will get a sliced array of the given array.
By Using the copy Of Range() system The copy of Range() system belongs to the Java Arrays class. It will be applying the clones to the specified range of the array to the now created array( slice array) and returns the recently created array that contains the specified range from the original array.
It takes O(n) time to produce slicing of an array and O(n) space to store rudiments, where n is the number of rudiments of the performing array by Using Java 8 Stream. By using the following way, we can find the slice of an array using the Java 8 Stream.
o First, find the start Index and end Index array
o Convert the rudiments( that are in range) into Primitive Stream using range() system.
o Using the chart() system chart the specified rudiments from the specified array.
o By invoking the to Array() system, convert the counterplotted array into an array.
o publish the sliced.
Questions
- Explain about the java stack trace with an example
