Answer Posted / vijayakumar chinnasamy

String:
1. Is final class.
2. Is immutable class i.e value can't change once it is
assigned.
3. When your text is not going to change ,then you use the
String.
4. is not thread safe


StringBuffer:

1. is final class.
2. is mutable object.
3. When your text is going to change and will be accessed
from multiple threads , then you use StringBuffer
4. is thread safe .

Method Overloading:
1. Morethan one method has same name and either the number
of argument or data type of arguments are differ.
2. Method can be overloaded in same class or its subclass.
3. Return type ,access specifier and throws Exception are
not part of overloading.
4. static method can be overloaded by nonstatic method.

Method Overriding:
1. A method has same name,return type, number of argument
and arguments data types are same in subclass and super class.
2. The subclass (inheriting) method has equal or higher
access specifier than it superclass method.
3. The subclass (inheriting) method's throws exception is
equal or subclass excpetion of superclass method(Inherited
class method).

Is arraylist ordered?

1119

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Which class should you use to obtain design information about an object in java programming?

1132

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What are conditionals and its types?

1186

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public class Test { public static void main(String[] args) { int countA = 0; int countB = 0; int countC = 0; int countD = 0; int countE = 0; int countF = 0; int countG = 0; int countH = 0; int countI = 0; int countJ = 0; int countK = 0; int countL = 0; int countM = 0; int countN = 0; int countO = 0; int countP = 0; int countQ = 0; int countR = 0; int countS = 0; int countT = 0; int countU = 0; int countV = 0; int countW = 0; int countX = 0; int countY = 0; int countZ = 0; } } Can anybody tell me any alternate solution(like loop or something) to automate this initialization process. Ex:- for(char chr='A';chr<='Z'; chr++) { (int) String "count"+chr = 0; }

2373

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Why lambda expression is used in java?

1117

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What class of exceptions are generated by the java run-time system?

1247

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What are the super most classes for all the streams?

2687

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Why stringbuilder is not thread safe?

1081

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What is 16 bits called?

986

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What do you mean by Function Overloading in java?

1219

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What is static class

1161

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Explain listiterator and methods in listiterator?

1064

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Explain the use of javap tool.

1184

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How do you use compareto method?

1067

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Why does java not support operator overloading?

1186

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