Java For Dummies Quick Reference

Parsing Strings

All primitive data types — except char — have methods that allow you to convert a string value to the primitive type. These methods are listed in the following table.

Wrapper	parse Method	Example Statement
Integer	parseInt(String)	int x = Integer.parseInt(“100”);
Short	parseShort(String)	short x = Short.parseShort(“100”);
Long	parseLong(String)	long x = Long.parseLong(“100”);
Byte	parseByte(String)	byte x = Byte.parseByte(“100”);
Float	parseByte(String)	float x = Float.parseFloat (“19.95”);
Double	parseByte(String)	double x = Double.parseDouble (“19.95”);
Boolean	parseBoolean	boolean x = Boolean.parseBoolean

Here’s an example that converts a String to an int:

String s = “10”;

int x = Integer.parseInt(s);

Note: An exception is thrown if the string does not contain a value that can be converted to a number of the appropriate type.