What is the use of optional ?

1036

What is boolean example?

975

What is the difference between Server and Container?

1256

What’s the difference between constructors and other methods?

1000

What do you mean by pointer value and address?

1053

What is the difference between a switch statement and an if statement?

1092

String and stringbuffer both represent string objects. Can we compare string and stringbuffer in java?

981

Which textcomponent method is used to set a textcomponent to the read-only state?

1142

How do you invoke a method?

1007

What is difference between arraylist and list in java?

1094

If you are given a choice to implement the code to either insert a record or update if already exist, which approach will you follow ?

1004

What is javac in java?

1013

What is the difference between Grid and Gridbaglayout?

1248

What do you mean by Hash Map and Hash Table?

1099

Why is the type for real numbers called double?

962