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Raja has Published 760 Articles
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raja
31K+ Views
The Layout managers enable us to control the way in which visual components are arranged in the GUI forms by determining the size and position of components within the containers. Types of LayoutManager There are 6 layout managers in Java FlowLayout: It arranges the components in a ... Read More
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raja
22K+ Views
The boolean array can be used to store boolean datatype values only and the default value of the boolean array is false. An array of booleans are initialized to false and arrays of reference types are initialized to null. In some cases, we need to initialize all values of the ... Read More
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raja
137 Views
A StringTokenizer is a subclass of Object class and it can allow an application to break a string into tokens. A set of delimiters can be specified either at creation time or on a per-token basis. An instance of StringTokenizer behaves in two ways depending on whether it was created ... Read More
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raja
349 Views
A TreeSet is a subclass of AbstractSet class and it does not allow duplicate elements. By default, TreeSet stores the elements in an ascending order and retrieval speed of an element out of a TreeSet is faster. The TreeSet class internally uses a TreeMap to store elements. The elements in ... Read More
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raja
141 Views
The getClass() method is from Object class and it returns an instance of the Class class. When we declare a new instance of an object, it will be referring to a class. There can only be one class per JVM but multiple object referring to it. So when we get ... Read More
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raja
515 Views
The dumpStack() method is a static method of Thread class and it can be used to print or display stack tracing of the current thread to System.err. The purpose of the dumpStack() method is basically for debugging and Internally this method is calling the printStackTrace() method of Throwable class. This ... Read More
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raja
1K+ Views
A String class can be used to represent the character strings, all the string literals in a Java program are implemented as an instance of a String class. The Strings are constants and their values cannot be changed (immutable) once created. We can use the startsWith() method of String class to ... Read More
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raja
6K+ Views
Yes, the protected method of a superclass can be overridden by a subclass. If the superclass method is protected, the subclass overridden method can have protected or public (but not default or private) which means the subclass overridden method can not have a weaker access specifier. Example class A { ... Read More
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raja
949 Views
A String is an object that represents an immutable sequence of characters and cannot be changed once created. The java.lang.String class can be used to create a string object. We can use the endsWith() method of String class to check whether a string ends with a specific string or not, it ... Read More
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raja
198 Views
Both double-type and float-type can be used to represent floating-point numbers in Java. A double-type is preferred over float-type if the more precise and accurate result is required. The precision of double-type is up to 15 to 16 decimal points while the precision of float type is only around 6 ... Read More