concatenate with the literal The length of s1 is in Java Assign DataMatrix in Java concatenate with the literal The length of s1 is

How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
2. concatenate with the literal The length of s1 is using java toinclude data matrix with web,windows application ISO Specification 1. invoke length() method for s1 System.out.println ("Th e length of s1 is " + s1.

length());. 3. invoke println() method to display Java uses + as the concatenation operator Similarly, line 8 invok Java ECC200 es the charAt() method, and line 9 invokes subString(). The output from is:.

The length of s1 is 17 The 7th character of s1 is P Java is FUN!. NOTES 1. The length of a Stri ng object is the number of characters, not the number of bytes. Since Java uses Unicode, there are two bytes per character.

. DEFINING DATA 2. Remember: the rst c haracter is located at position 0 (i.e.

, everything is relative to 0). Thus, the seventh character of s1 is P, but it is referenced as position number 6. Similar to String, Java also has a class named StringBuffer that behaves a little more like a COBOL alphanumeric eld.

You can create a StringBuffer object with a given size and then store data in it, up to the size of the buffer.. CHANGING VARIABLE TYPES Java gives us the abili ty to change the data type of a variable. This capability is called type casting or simply casting. Let s illustrate casting with an example.

First, let s take a quick look at using the Java assignment statement to do computation. The COBOL statement. COMPUTE ANSWER = 1.5 + INTEGER1 / INTEGER2 looks almost the same w hen written in Java:. answer = 1.5 + integer1 Data Matrix ECC200 for Java / integer2;. The same rules of opera tor precedence apply (division before addition) and the result of the computation is placed in the variable answer. So, we have a variable named answer we have de ned as:. double answer;. Let s also have two int eger variables named integer1 and integer2 de ned and initialized as follows:. int integer1 = 3; int i Data Matrix ECC200 for Java nteger2 = 2;. When we execute the following computation statement, what do you think answer will contain Changing Variable Types answer = 1.5 + integer1 / integer2; System.out.

println ("The answer is " + answer);. Program output:. The answer is 2.5 Wait a minute! When we Java Data Matrix barcode divide 3 by 2 we get 1.5, then when we add 1.5 we get 3 right Why, then, did we get 2.

5 instead of 3 The variables integer1 and integer2 are integer values and the result of the division is 1, not 1.5. Just like in COBOL, the decimal is truncated unless we specify decimal positions.

We can correct this error by casting the integer division to type double, which tracks up to 15 decimal positions. Now answer contains 3..

the literal 1.5 is assumed to be type double converts the result of the division to type double answer = 1.5 + (double) Java Data Matrix 2d barcode integer1 / integer2;. Program output:. The answer is 3.0 The program executes this example and is shown in Listing 4.2. Listing 4.2: public class CastDemo { public static void main (String args []) { double answer; int integer1 = 3; int integer2 = 2; answer = 1.5 + integer1 / integer2; System.out.

println ("The first answer is " + answer);. DEFINING DATA answer = 1.5 + (double) integer1 / integer2; System.out.

println ("The second answer is " + answer); } // end of main method } // end of Program output:. The answer is 2.5 The second answer is 3.0 In COBOL, if we move a Java Data Matrix barcode PIC 9(3)V99 eld to a PIC 9(1) eld, we risk losing data because of truncation. The Java compiler helps us avoid truncation errors when we mix data types in an assignment statement. In general, the compiler permits us to assign a type with a smaller potential range of values to a type with a larger range of values, but produces an error when we attempt to assign a larger type to a smaller type.

To illustrate, two of the four integer data types are byte with a range of 128 to +127 and short with a range of 32,768 to +32,767. We are allowed to assign byte values to short values. For example, given the following variable de nitions and value assignments:.

byte aByteVariable; sho rt aShortVariable; aByteVariable = 112; aShortVariable = 128;. Range: 128 to +127 Range: 32768 to +32767 We can execute the statement:. aShortVariable = aByteV Java Data Matrix barcode ariable;. Value in aShortVariable is 112 After executing this st Data Matrix for Java atement, aShortVariable is assigned the value of 112. However, the following statement produces a compiler error because we are at risk of truncation (assuming originally assigned values):. aByteVariable = aShortV ariable;.
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