Explain creating threads by implementing runnable class?

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What is the difference between applet and application?

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Why strings in java are called as immutable?

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How do you find the independent variable?

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Is it safe for adding 10,00,000 records/objects to HashMap?, i.e is it safe to add millions of objects to HashMap?

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What is OOPs & Why?

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what is the difference between HashMap and Hashtable

17 Answers   Value Labs, Virtusa,

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Why set do not allow duplicates in java?

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we have syntax like for(int var : arrayName) this syntax is to find whether a number is in the array or not.but i want to know how to find that number's location.

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Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.

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What is a type parameter in java?

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Can you explain the usages of class.forname()?

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