In OOP, this criticism is increased because of the existing object-oriented design patterns that replaces the switch function.ĭesign patterns are recommended practices that improve the quality of object-oriented programs. The use of the switch statement in different languages has been criticized for creating a source code which violates the structured programming paradigm. Criticism of the use of the switch statement We also use the default clause to indicate that the selected option does not correspond to any valid option. In this case we use break in each case clause and only one option is executed. JOptionPane.showMessageDialog(null, option "Congratulations, you have chosen option 4") "Congratulations, you have chosen option 3") "Congratulations, you have chosen option 2") "Congratulations, you have chosen option 1") String option = JOptionPane.showInputDialog(menu.toString()) String menu = new String("Choose one option: 1, 2, 3 o 4 \n") Following is the syntax of using a switch case in Java. After the release of java 7 we can even use strings in the cases. These multiple values that are tested are called cases. This is a common case where our program makes the user choose from several options: Java switch statement is like a conditional statement which tests multiple values and gives one output. A switch statement is another useful way to control the flow of program which is mostly used in those cases where we need our program to act on a single. The weekDay.toUpperCase () method converts all lowercase letters present in the String object to uppercase, so the comparison works even when we enter the day of the week in lowercase. We do not use the optional default clause. JOptionPane.showMessageDialog(null, "We have \"" daysLeft "\" to end the week") String weekDay = JOptionPane.showInputDialog("Enter the day of the week") In this example, we enter a day of the week in English and the program returns the list the days of the week we have left to finish the week. Example without break “Days of the week left”
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