Using dialog box for Input and Output
Using Console output windows to prompt for Input and output is very old-fashioned . And sometimes outdated. The more current way is to create a separate pop-up windows for each input.
Call the static showInputDialog method of the JOptionPane class, and supply the string that prompts the input from the user. For example:
Read an Integer
String strNumber= JOptionPane.showInputDialog("Enter an integer number:");
The above method returns a String object.
Use the Integer.parseInt(strNumber) to convert the strNumber to an Integer intNumber
int intNumber = Integer.parseInt(strNumber) ;
Read a number with decimal points.
String strPrice= JOptionPane.showInputDialog("Enter a price:");
The above method returns a String object.
Use the Double.parseDouble(strPrice) to convert the strPrice to a double number dblPrice
double dblPrice = Double.parseDouble(strPrice) ;
Display on a messgebox
JOptionPane.showMessageDialog(null, "Price : " + price);
Using Console output windows to prompt for Input and output is very old-fashioned . And sometimes outdated. The more current way is to create a separate pop-up windows for each input.
Call the static showInputDialog method of the JOptionPane class, and supply the string that prompts the input from the user. For example:
Read an Integer
String strNumber= JOptionPane.showInputDialog("Enter an integer number:");
The above method returns a String object.
Use the Integer.parseInt(strNumber) to convert the strNumber to an Integer intNumber
int intNumber = Integer.parseInt(strNumber) ;
Read a number with decimal points.
String strPrice= JOptionPane.showInputDialog("Enter a price:");
The above method returns a String object.
Use the Double.parseDouble(strPrice) to convert the strPrice to a double number dblPrice
double dblPrice = Double.parseDouble(strPrice) ;
Display on a messgebox
JOptionPane.showMessageDialog(null, "Price : " + price);
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- Язык программирования Java
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