Answer Posted / satheesh kannan

MenuItem is associated with a single event where as
CheckBoxMenuItem is associated with two events(it is having
a toggle state-enable/disable)

File->open is best example of menu item , it opens a "open
dialog" box when we click this is taken as a single event,

View-->status bar is a checkboxmenuitems, which has two
states, If it "on", the status bar gets displayed in IE,if
we click it again its gets "Off", the status bar is hidden.
(similar to a checkbox)

These static constructors are correct ? class A { statc intA() { } static A(int x,int y) { } static A(int x) { } }

1084

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1012

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How to overcome the exception object reference not set to an instance of object?

1146

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What is a method header?

1017

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What is the difference between the file and randomaccessfile classes?

1093

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Can a class extend more than one class?

1118

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Explain constructors and types of constructors in java.

1105

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What is final keyword?

1153

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Should you use singleton pattern?

935

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What is the difference between jdk, jre, and jvm?

1107

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How do you test a method for an exception using junit?

1203

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Can this keyword be used to refer static members?

1024

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Is object a data type?

962

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How do you check if an arraylist is not empty?

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What are thread priorities and importance of thread priorities in java?

1131

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