try block inside a try block is known as a nested try block. Note: The exception handler must be also nested in case the try block is nested. Syntax of the nested try block try{ //block of statements try{ //block of statements }catch(Exception handler class){ } }catch(Exception handler class){ } NestedTryExample.java class ArithmaticTest{ … Read more
If more than one exception can occur in one try block, then we can use multiple catch blocks to provide appropriate handlers to different exception objects. Note: in case of multiple catch blocks, blocks must be placed from specific handler to general handler. Syntax of try block with multiple catch blocks: try{ //block of … Read more
try block try block is used to enclose the code that might throw an exception. It must be followed by either a catch or finally or both blocks. Syntax of a try block with catch block try{ //block of statements }catch(Exception handler class){ } Syntax of try block with finally block try{ … Read more
Exception handling is a mechanism to handle runtime errors so that the normal flow of the program can be maintained. Exception Hierarchy Throwable is the superclass. Advantages/Benefits of Exceptional Handling Using exceptional handling we can separate the error handling code from normal code. Using exceptional handling we can differentiate the error types. The … Read more
ensureCapacity(int minCapacity): ensures that the capacity is at least equal to the specified minimum. Syntax: public void ensureCapacity(int minCapacity) Note: If the current capacity is greater than the argument there will be no change in the current capacity. If the current capacity is less than the argument there will be a change in the current … Read more
capacity(): returns the current capacity of the string builder. Capacity refers to the amount of available storage. Syntax: public int capacity() StringBuilder capacity() Example class TestStringBuilder{ StringBuilder sb = new StringBuilder(); public void capacityTest(){ //default capacity. System.out.println(sb.capacity()); sb.append(“Hello “); //current capacity 16. System.out.println(sb.capacity()); sb.append(“www.hello.com”); //current capacity (16*2)+2=34 i.e (oldcapacity*2)+2. System.out.println(sb.capacity()); } } public … Read more
reverse(): replace the string builder’s character sequence with the reverse character sequence. Syntax: public StringBuilder reverse() StringBuilder reverse() Example class TestStringBuilder{ StringBuilder sb = new StringBuilder(“www.w3schools.blog”); public void reverseTest(){ //replace the string buffer’s character //sequence by reverse character sequence. System.out.println(sb.reverse()); } } public class StringBuilderReverseExample { public static void main(String args[]){ //creating TestStringBuilder … Read more
delete(int startIndex, int endIndex): delete the substring of the string builder from startIndex to endIndex-1. Syntax: public StringBuilder delete(int startIndex, int endIndex) Note: startIndex should be between 0 and to length of the string or less than endIndex, if it is not StringIndexOutOfBoundsException will be thrown. StringBuilder delete() Example class TestStringBuilder{ StringBuilder sb … Read more
replace(int startIndex, int endIndex, String str): replace the substring of the string builder from startIndex to endIndex-1 with the specified string. Syntax: public StringBuilder replace(int startIndex, int endIndex, String str) Note: startIndex should be between 0 and to length of the string or less than endIndex, if it is not StringIndexOutOfBoundsException will be … Read more
insert(int offset, String str): insert a specified string at the offset indicated position. Syntax: public StringBuilder insert(int offset, String str) Note: If the specified string is null then it inserts the “null” string at the offset indicated position. If the insert has an object, int, double, etc instead of a string then the argument … Read more