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Following are the various constructors provided by the StringBuffer class.S.N.Constructor & Description1StringBuffer()This constructs a string buffer with no characters in it and an initial capacity of 16 characters.2StringBuffer(CharSequence seq)This constructs a string buffer that contains the same characters as the specified CharSequence.3StringBuffer(int capacity)This constructs a string buffer with no characters in it and the specified initial capacity.4StringBuffer(String str)This constructs a string buffer initialized to the contents of the specified string.
To sort the contents of an ArrayList in descending orderCreate an ArrayList.Sort the contents of the ArrayList using the sort() method of the Collections class.Then, reverse array list using the reverse() method of the Collections class.Example:import java.util.ArrayList; import java.util.Collections; public class ArrayListSample { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add("JavaFx"); list.add("Java"); list.add("WebGL"); list.add("OpenCV"); Collections.sort(list); System.out.println(list); Collections.reverse(list); System.out.println(list); } }Output:[Java, JavaFx, OpenCV, WebGL] [WebGL, OpenCV, JavaFx, Java]
Use Integer.toString(int, redix) where int is byte to be converted and redix is 16 for hexadecimal format.
The intern() method of the String method returns a canonical representation for the string object. A pool of strings, initially empty, is maintained privately by the class String.For any two strings s and t, s.intern() == t.intern() is true if and only if s.equals(t) is true.All literal strings and string-valued constant expressions are interned.Example Live Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { String str1 = "This is TutorialsPoint"; // returns canonical representation for the string object String str2 = str1.intern(); // prints ... Read More
You can replace an element of an ArrayList using the set() method of the Collections class. This method accepts two parameters an integer parameter indicating the index of the element to be replaced and an element to replace with.Example Live Demoimport java.util.ArrayList; public class ArrayListSample { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add("JavaFx"); list.add("Java"); list.add("WebGL"); list.add("OpenCV"); System.out.println(list); list.set(2, "HBase"); System.out.println(list); } }Output[JavaFx, Java, WebGL, OpenCV] [JavaFx, Java, HBase, OpenCV]
You can convert a String value to an integer either using the valueOf() method of the String class or using the toString() method of the Integer class.
Actually, the case sensitivity of database and table name depends a lot on the case sensitivity of the underlying operating system. Hence, we can say that such names are not case sensitive in Windows but are case sensitive in most varieties of Unix.
To set outline color, use the outlineColor property in JavaScript. You can try to run the following code to learn how to implement outlineColor property − Example Live Demo #box { border: 2px solid red; } Demo Content Change outline color function display() { document.getElementById("box").style.outlineColor = "#FF5733"; document.getElementById("box").style.outline = "2px solid"; }
To convert a comma separated String into an ArrayListSplit the String into an array of Strings using the split() method.Now, convert the obtained String array to list using the asList() method of the Arrays class.Example Live Demoimport java.util.Arrays; import java.util.List; public class Sample { public static void main(String[] args) { String myString = "JavaFx,Java,WebGL,OpenCV"; String[] myArray = myString.split(","); System.out.println("Contents of the array ::"+Arrays.toString(myArray)); List myList = Arrays.asList(myArray); } }OutputContents of the array ::[JavaFx, Java, WebGL, OpenCV]
