Java - Integer getInteger() method

Description

The Java Integer getInteger(String nm) method determines the integer value of the system property with the specified name.

Declaration

Following is the declaration for java.lang.Integer.getInteger() method

public static Integer getInteger(String nm)

Parameters

nm − This is the property name.

Return Value

This method returns the Integer value of the property.

Exception

NA

Getting Integer from an Existing System Property Example

The following example shows the usage of Integer getInteger() method to get Integer value of a system property. We've created a string variable and assigned it a valid system property string. Then using getInteger() method, we're printing the Integer value of the system property.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {

      // determines the integer value of the system property 
      String str = "sun.arch.data.model";
      System.out.println(Integer.getInteger(str));
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

64

Getting Integer from a Non-Existent System Property Example

The following example shows the usage of Integer getInteger() method to get Integer value of a non-existent system property. We've created a string variable and assigned it a invalid system property string. Then using getInteger() method, we're checking the Integer value of the system property which will be printed as null.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {

      // determines the integer value of the system property 
      String str = "java";
      System.out.println(Integer.getInteger(str));
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

null