Tag: programming languages

Select the new keyword since J2SE 1.4

Assume the bit pattern of byte x is: 10110001. What will the sign of x be after x>>2?

What happens when you compare two primitives of different numerical types?

All exceptions inherit from

package polymorphism; class TestSup { static int p = 100; } public class TestPoly extends TestSup { public static void main(String[] args) { TestPoly TP = new TestPoly(); TP.p = 400; TestSup TS = new TestSup(); TS.p = 100; TestSup TSP = new TestPoly(); TSP.p = 500; System.out.print("TestSup = " + TestSup.p); System.out.print(" ,TestPoly = " + TestPoly.p); System.out.print(" ,TP = " + TP.p); System.out.print(" ,TS = " + TS.p); System.out.print(" ,TSP = " + TSP.p); } }

package polymorphism; class TestPolymorphismSuper { int p; TestPolymorphismSuper testPoly() { TestPolymorphismSuper TS = new TestPolymorphismSuper(); TS.p =100; return TS; } } public class TestPolymorphism1 extends TestPolymorphismSuper{ TestPolymorphism1 testPoly() { TestPolymorphism1 TSub = new TestPolymorphism1(); TSub.p =500; return TSub; } public static void main(String[] args) { TestPolymorphismSuper TSuper = new TestPolymorphism1(); TSuper = TSuper.testPoly(); System.out.println(TSuper.p); } }

package polymorphism; class TestPolymorphismSuper1 { String name; TestPolymorphism2 testPoly() { TestPolymorphism2 TS = new TestPolymorphism2(); TS.name ="tcs"; return TS; } } public class TestPolymorphism2 extends TestPolymorphismSuper1{ TestPolymorphism2 testPoly() { TestPolymorphism2 TSub = new TestPolymorphism2(); TSub.name = "UX"; return TSub; } public static void main(String[] args) { TestPolymorphismSuper1 TSuper = new TestPolymorphism2(); TSuper.testPoly(); System.out.println(TSuper.name); } }

package polymorphism; class TestSuperr { double TestPoly(long a, float b, int c) { return ((a + b) * c); } } public class TestPolym extends TestSuperr { double TestPoly(long a, double b, int c) { return (a + b + c); } public static void main(String[] args) { TestSuperr TSU = new TestPolym(); double p = TSU.TestPoly(11, 9, 10); System.out.print("p = " + p); p1 = TSU.TestPoly(11, 9.0, 10); System.out.print(" ,p1 = " + p1); } }

package polymorphism; class TestSupe { static int p = 100; } public class TestPoly1 extends TestSupe { static int p =1000; public static void main(String[] args) { TestPoly1 TP = new TestPoly1(); TP.p = 400; TestSupe TS = new TestSupe(); TS.p = 300; TestSupe TSP = new TestPoly1(); TSP.p = 500; System.out.print("TestSupe = " + TestSupe.p); System.out.print(" ,TestPoly = " + TestPoly1.p); System.out.print(" ,TP = " + TP.p); System.out.print(" ,TS = " + TS.p); System.out.print(" ,TSP = " + TSP.p); } }

package exceptions; public class TestException4 { static String trimString(String x) { return x.trim(); } public static void main(String[] args) { try { String s = trimString(" tcs "); System.out.println("s = "+s); } finally { System.out.println("In finally"); } } }