A string is a palindrome if its value is the same when reversed. For example,abais a palindrome string. TheStringclass doesn’t provide any method to reverse the string but theStringBufferandStringBuilderclasses have areverse()method that you can use to check whether a string is a palindrome...
4.Java String Interview Questions and Answers The String is the most used Java class. Java interview usually starts with tricky questions related to String. This post contains 21 questions with detailed answers for String in Java. 5.Java Multi-Threading and Concurrency Interview Questions Multithreadi...
public class Fruit{public static void main(String[ ]args){TreeMap<Sting,String> names =new TreeMap<String,String>( );names.put(“key1”,“cherry”);names.put(“key2”,“banana”);names.put(“key3”,“apple”);names.put(“key4”,“kiwi”);names.put(“key2”,“orange”);System.ou...
Strings in Java are immutable to provide security to all variables used in the program, thread-safe (they can be shared among threads without having a native code) and optimum formemory (using logical string pooling). 68) Is it possible tooverride a private or static method in Java? Private...
Before coding the solution, interview candidates are expected to ask some follow-up questions. In particular:Should a run be encoded even if it makes the resulting string longer? Should a run be encoded even if it doesn’t make the resulting string shorter? (This can be answered from the ...
Once the main method terminates, the java program terminates as well. Main: The "main" method name is an identifier that the JVM looks for as the starting point of the Java program. String[] args: This is an array of strings which stores arguments passed by command line while starting a...
class InterviewBit{ String department; String service; InterviewBit(InterviewBit ib){ this.departments = ib.departments; this.services = ib.services; } } Here we are initializing the new object value from the old object value in the constructor. Although, this can also be achieved with the ...
[Interview Question ][Data Structure] Two Sum Problem -Array Two sum problem is one of the most asked data structure questions for a java developer interview. There could be one or more ways to solve the problem but i am trying to give the optimized solution to this problem. Lets first...
Consider the following Java program: public class StringConcatenationBenchmark { public static void main(String[] args) throws Exception { String string1 = "Hello "; String string2 = "World!"; String concatResult = string1 + string2; System.out.println(concatResult); } } When we compile ...
public class Demo{public void func(){int num;System.out.println("The number is : " + num);}public static void main(String args[]){Demo obj = new Demo();obj.func();}} 上面的程序包含一个局部变量num. 导致错误“变量num可能尚未初始化” ...