What is meant by tab pans?

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Is it possible to write a regular expression to check if string is a number?

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What is lifetime variable?

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What is break and continue statement?

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Can we define private and protected modifiers for the members in interfaces?

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what is an objects lock and which objects have locks? : Java thread

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Hi Every One I Have Small Doubt Please answer This???????????????????????????? I Want to use AbstractList class methods(java.util.AbstractList) My Program is import java.util.*; class DemoOne extends AbstractList { public static void main(String[] args) { AbstractList a=new DemoOne();//This One is Correct?? DemoOne a1=new DemoOne();//This One is Correct?? Both Are Not Working System.out.println("Hello World!"+a); System.out.println("Hello World!"+a1); } } Error IS: DemoOne.java:2: DemoOne is not abstract and does not override abstract method get(int) in java.util.AbstractList class DemoOne extends AbstractList AnyOne can Please Provide The Solution????????????????????????? Plzzzzzzz

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What is a boolean flag in java?

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What is parsing in java?

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Is call by reference possible in java?

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Can we declare variables inside a method as Final Variables?

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What about abstract classes in java?

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