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Wrapper Classes in Java Implement 2d Data Matrix barcode in Java Wrapper Classes

Wrapper Classes using barcode maker for java control to generate, create datamatrix 2d barcode image in java applications. UPC Case Code Float aFloatFromStri ECC200 for Java ng = Float.valueOf (aStringFromFloat); Integer anIntegerFromString = Integer.valueOf (aStringFromInteger); Long aLongFromString = Long.

valueOf (aStringFromLong); System.out.println("aDoubleFromString =" + aDoubleFromString); System.

out.println("aFloatFromString =" + aFloatFromString); System.out.

println("anIntegerFromString =" + anIntegerFromString); System.out.println("aLongFromString =" + aLongFromString); // do arithmetic with objects double d = aDouble.

doubleValue() + aDoubleFromString.doubleValue(); System.out.

println("d =" + d); float f = aFloat.floatValue() + aFloatFromString. floatValue(); System.

out.println("f =" + f); int i = anInteger.intValue() + anIntegerFromString.

intValue(); System.out.println("i =" + i); long l = aLong.

longValue() + aLongFromString. longValue(); System.out.

println("l =" + l); } // end main } // end WrapperDemo.java. The output from the program is:. aDouble =123.456 aFl datamatrix 2d barcode for Java oat =123.456 anInteger =123 aLong =123456 aStringFromDouble =123.

456 aStringFromFloat =123.456 aStringFromInteger =123. COMPUTATION aStringFromLong =123 Java datamatrix 2d barcode 456 aDoubleFromString =123.456 aFloatFromString =123.456 anIntegerFromString =123 aLongFromString =123456 d =246.

912 f =246.912 i =246 l =246912. ARITHMETIC OPERATORS COBOL has the COMPUT barcode data matrix for Java E statement to do computation, plus individual statements to ADD, SUBTRACT, MULTIPLY, and DIVIDE. Java does computation using the assignment statement, which evaluates an expression on the right side of the assignment operator (=) and stores the result in the variable on the left side. An expression is simply some combination of operators, variables, and values that evaluate to a result.

Note that unlike COBOL, Java expressions may evaluate to a boolean value (true or false).. result = (expression);. The expression is ev ECC200 for Java aluated and the result stored in the variable on the left side of the = sign. . Java uses the basic arithmetic operators add, subtract, multiply, and divide (+, -, *, /) which are the same as those used in COBOL s COMPUTE statement. Some examples are:. balance = balance - Java data matrix barcodes checkAmount; interestCharged = loanBalance * interestRate;. COBOL Equivalent:. COMPUTE BALANCE = BALANCE - CHECK-AMOUNT COMPUTE INTEREST-CHARGED = LOAN-BALANCE * INTEREST-RATE Java provides us with several additional arithmetic operators, as indicated in Table 5.4. The Math Class TABLE 5.4. Java Arit hmetic Operators Operator + * / % i++ i-++i --i Function Add Subtract Multiply Divide Modulus Post-increment Post-decrement Pre-increment Pre-decrement COBOL Equivalent + * / Mod function No direct equivalent No direct equivalent No direct equivalent No direct equivalent.

The modulus operator Java ECC200 returns the integer remainder of a division operation. For example the expression 2%1 (i.e.

, 2/1 = 2, remainder 0) returns 0, but 3%2 (i.e., 3/2 = 1, remainder 1) returns 1.

The increment/decrement operators (i++, i--, ++i, --i) are inherited from the C++ language and have no direct COBOL equivalent, although we can do the same things with a little more code. These operators are merely coding shortcuts, but we will explain them here because many Java programmers use them. The Java language also has assignment operators, which are simply the arithmetic operators (+,-, *, /, %) combined with the assignment operator (=).

Again, we can do the same thing in COBOL but it requires a little more code. Table 5.5 illustrates these coding shortcuts.

As COBOL programmers, we generally shy away from coding shortcuts that reduce the clarity, and therefore the maintainability, of programs. However, as you become accustomed to these new techniques they become more familiar and seem less cryptic..

THE MATH CLASS The Math class, a me Data Matrix ECC200 for Java mber of the java.lang package, provides several important computational methods. Some of the more popular methods are listed in Table 5.

6. Note that those with an asterisk (*) have a corresponding COBOL function (ANSI-85). All of the methods are static (class) methods, which means we do not create an object of the Math class and we call the.

COMPUTATION TABLE 5.5. Using Jav Java datamatrix 2d barcode a Shortcut Code Java Code i = i + 1; i = i - 1; i = j + 1; i = j; i = j - 1; i = j; i i i i i = = = = = i i i i i + / * % 2; 2; 2; 2; 2; Java Shortcut Code i++; i--; i = ++j; i = --j; i i i i i += -= /= *= %= 2; 2; 2; 2; 2; COBOL Equivalent COMPUTE I = I + 1 COMPUTE I = I - 1 COMPUTE I = J + 1 MOVE J TO I COMPUTE I = J - 1 MOVE J TO I COMPUTE I = I COMPUTE I = I COMPUTE I = I COMPUTE I = I I = MOD(I, 2) + / * 2 2 2 2.

methods using the cl ass name: Math.random(), for example. Note that the round() method returns a whole number, round(double) returns type long, and round(float) returns type int.

This is signi cantly different than the way the COBOL ROUNDED clause works. COBOL rounds to the number of decimals contained in the result eld picture clause. The Math class also includes methods to do trigonometric and logarithm calculations if you are interested.

In addition, it has two static constants:.
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