Tutorials

Convert String to Number

In this section, we will learn how to convert String to Number.

In this section, we will learn how to convert String to Number.

Convert String to Number

In this section, we will learn how to convert String to Number. The following program provides you the functionality to convert String to Number.

Code Description:

In this program we have taken a String of int, byte, boolean, double as shown below and also we have used the method MIN
_VALUE and MAX_VALUE of different wrapper classes to print all the values on int, short, double etc.

Here is the code of the program:

 public class StrToNum{   public static void main (String args[]){   String table = "Table of the Java Numbers\n" +  "Primitive Type\tSize in Bits\tTypical Value\tMinimum Value \tMaximum Value\n" +  "**************\t**************\t**************\t********** ****\t**************\n";      // int   table += "int\t\t" + 32 + "\t\t" + 65536 + "\t\t" + Integer.MIN_VALUE  + "\t" + Integer.MAX_VALUE + "\n";   // byte   table += "byte\t\t" + 8 + "\t\t" + (byte)5 + "\t\t" + Byte.MIN_VALUE  + "\t\t" + Byte.MAX_VALUE + "\n";   // short   table += "short\t\t" + 16 + "\t\t" + (short)1024 + "\t\t" + Short.MIN_VALUE  + "\t\t" + Short.MAX_VALUE + "\n";   //boolean   table += "boolean\t\t" + "\t\t" + true + ',' + false + "\t\t" + "\n";   // double   table += "double\t\t" + 64 + "\t\t" + 100e100 + "\t\t" + Double.MIN_VALUE +  "\t" + Double.MAX_VALUE + "\n";   table +=  "**************\t**************\t**************\t***************\t************\n";   System.out.println(table); } }

Output of the program:

 C:\unique>javac StrToNum.java C:\unique>java StrToNum Formatable of the Java Numbers Primitive Type   Size in Bits  Typical Value  Minimum Value   Maximum Value ************** ************** ************** ************** ************** int   32  65536   -2147483648  2147483647 byte  8  5   -128  127 short  16  1024  -32768  32767 boolean   true,false double   64  1.0E102   4.9E-324   1.79769313486231 57E308 ************** ************** ************** *************** ************ C:\unique>