Read e-book online Active Java: Object-Oriented Programming for the World Wide PDF

By Adam Freeman, Darrel Ince

ISBN-10: 0201403706

ISBN-13: 9780201403701

Covers the most principles at the back of the language and gives a radical creation to new strategies and matters linked to utilizing Java. Illustrated all through with examples. Paper.

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Extra resources for Active Java: Object-Oriented Programming for the World Wide Web

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Equals(nameToBeSearchedFor)) { in = true; index = counter; break; } counter++; } The break statement here transfers control to the statement following the while statement. Java contains a second repetitive statement which is similar to the while statement which we have described above. This is the do-while statement. It is similar to the while statement in that it implements repetitive processing while a certain condition is true. However, the test as to whether a loop needs to be terminated occurs at the end of the statement as compared with the while statement where the test is made at the beginning.

3 Increment and decrement operators. Symbol Postfix increment Operator ++ Written as x++ Prefix increment ++ ++x Postfix decrement –– x–– Prefix decrement –– ––x Meaning Add 1 to x and return the old value Add 1 to x and return the new value Take 1 from x and return the old value Take 1 from x and return the new value if newInc has the current value 79. First 79 is incremented by 1 and this value is placed back in the variable newInc. This new value is then returned. Since the increment and decrement operators deliver results, they can be used in any context where the value can be used, for example in assignments: int j=0, k; k = j++; first increments the variable j by 1 to give it a value of 1 and then sets k to be the value 0 which was the old value of j.

This is similar to modulo arithmetic. There is also a class of operators known as arithmetic assignment operators. These mainly carry out some arithmetic operation such as addition and then assign the result to one of the variables used in the expression containing the operator. 2. 1 Arithmetic operators. 2 Assignment operators. Symbol = Operator Assign Written as a = b += Add and assign a += b -= Subtract and assign a -= b Meaning Put the value of b into a Put the value of a+b into a Put the value of a– b into a *= Multiply and assign a*= b /= Divide and assign a /= b %= Remainder and assign a %= b Put the value of a*b into a Put the value of a/ b into a Put the value of a%b into a As an example of the use of this operator consider the section of code shown below: int a = 12, b = 22; a+=b; This results in the sum of a and b being formed (34) and the result being deposited into a.

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Active Java: Object-Oriented Programming for the World Wide Web by Adam Freeman, Darrel Ince

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