How does thread synchronization occurs inside a monitor? What levels of synchronization can you apply?

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What is empty string literal in java?

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Can we access private data outside of the class directly in java programming language? Why There is no runtime checking in java, which leads to access the private data directly outside of a class?

5 Answers   Google,

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What is a lock or purpose of locks in java?

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Given: 10. interface A { void x(); } 11. class B implements A { public void x() { } public voidy() { } } 12. class C extends B { public void x() {} } And: 20. java.util.List list = new java.util.ArrayList(); 21. list.add(new B()); 22. list.add(new C()); 23. for (A a:list) { 24. a.x(); 25. a.y();; 26. } What is the result? 1 Compilation fails because of an error in line 25. 2 The code runs with no output. 3 An exception is thrown at runtime. 4 Compilation fails because of an error in line 20.

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What are the main differences between notify and notifyAll in Java?

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What is a control variable example?

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What happens when you assigned a 'double' value to a 'String'?

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Can we increase size of array?

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What is callablestatement? How you can call stored procedure to pass in parameter?

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Explain runtime exceptions?

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what is the use/perpose of having a method antive?

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