JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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What is Java Static Import?


Description:

In general, any class from same package can be called without importing it. Incase, if the class is not part of the same package, we need to provide the import statement to access the class. We can access any static fields or methods with reference to the class name. Here comes the use of static imports. Static imports allow us to import all static fields and methods into a class and you can access them without class name reference.

The syntax for static imports are given below:


Code:
package com.java2novice.staticimport;
// To access all static members of a class
import static package-name.class-name.*;
//To access specific static variable of a class
import static package-name.class-name.static-variable;
//To access specific static method of a class
import static package-name.class-name.static-method;

Static Import Example:

Here we have two classes. The class MyStaticMembClass has one static variable and one static method. And anther class MyStaticImportExmp imports these two static members.



MyStaticMembClass.java
package com.java2novice.stat.imp.pac1;

public class MyStaticMembClass {

	public static final int INCREMENT = 2;
	
	public static int incrementNumber(int number){
		return number+INCREMENT;
	}
}

MyStaticImportExmp.java
package com.java2novice.stat.imp.pac2;

import static com.java2novice.stat.imp.pac1.MyStaticMembClass.*;

public class MyStaticImportExmp {

	public static void main(String a[]){
		System.out.println("Increment value: "+INCREMENT);
		int count = 10;
		System.out.println("Increment count: "+incrementNumber(count));
		System.out.println("Increment count: "+incrementNumber(count));
	}
}

Output:
Increment value: 2
Increment count: 12
Increment count: 12
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Knowledge Centre
Difference between while and do-while
The while statement verifies the condition before entering into the loop to see whether the next loop iteration should occur or not. The do-while statement executes the first iteration without checking the condition, it verifies the condition after finishing each iteration. The do-while statement will always execute the body of a loop at least once.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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