How to Convert Strings to Doubles in Java?

Parsing Strings to Doubles in Java

Converting a String representation of a numerical value to a double-precision floating-point number (double) in Java can be achieved using the Double.parseDouble() method. This method expects a String containing a valid double-like representation.

Conversion Process

To convert a String to a double using Double.parseDouble(), simply:

1. Define your String variable containing the numerical value, e.g., "12.34".
2. Use Double.parseDouble() on the String to create a double value.

For instance:

// Example String
String text = "12.34";

// Convert String to double
double value = Double.parseDouble(text);

Practical Application

In your specific case, you mentioned wanting to convert two JLabels' text values (total and price) to doubles. Here's how you could implement it:

// Get text from JLabels
String jlbTotalText = jlbTotal.getText();
String jlbPriceText = jlbPrice.getText();

// Convert text to doubles
double total = Double.parseDouble(jlbTotalText);
double price = Double.parseDouble(jlbPriceText);

By utilizing Double.parseDouble(), you can effectively convert Strings representing numerical values into their corresponding double representations, enabling robust data handling in your Java application.

The above is the detailed content of How to Convert Strings to Doubles in Java?. For more information, please follow other related articles on the PHP Chinese website!