Here we are going to learn about injection of objects.
<!-- here I will create three points eg (0,0) (-20,0) and
(0,20) -->
DrawingApp.java
package org.yash.watertechsol;
import org.springframework.context.ApplicationContext;
import
org.springframework.context.support.ClassPathXmlApplicationContext;
public class DrawingApp {
public static void main(String[]
args){
ApplicationContext
context = new ClassPathXmlApplicationContext("spring.xml");
Triangle triangle
= (Triangle)context.getBean("triangle");
triangle.draw();
}
}
Triangle.java
package org.yash.watertechsol;
public class Triangle {
private Point pointA;
private Point pointB;
private Point pointC;
public Point getPointA() {
return pointA;
}
public void setPointA(Point pointA) {
this.pointA = pointA;
}
public Point getPointB() {
return pointB;
}
public void setPointB(Point pointB) {
this.pointB = pointB;
}
public Point getPointC() {
return pointC;
}
public void setPointC(Point pointC) {
this.pointC = pointC;
}
public void draw(){
System.out.println("Point A
= (" + getPointA().getX()+", "+getPointA().getY()+")");
System.out.println("Point B
= (" + getPointB().getX()+", "+getPointB().getY()+")");
System.out.println("Point C
= (" + getPointC().getX()+", "+getPointC().getY()+")");
}
}
Point.java
package org.yash.watertechsol;
public class Point {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
}
spring.xml
<?xml
version="1.0" encoding="UTF-8"?>
<!DOCTYPE
beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="triangle"
class="org.yash.watertechsol.Triangle">
<property name="pointA"
ref="zeroPoint" />
<property name="pointB"
ref="point2" />
<property name="pointC"
ref="point3" />
</bean>
<!-- here I
will create three points eg (0,0) (-20,0) and (0,20) -->
<bean id
="zeroPoint"
class="org.yash.watertechsol.Point">
<property name="x"
value="0" />
<property name="y"
value="0" />
</bean>
<bean id
="point2"
class="org.yash.watertechsol.Point">
<property name="x"
value="-20" />
<property name="y"
value="0" />
</bean>
<bean id
="point3"
class="org.yash.watertechsol.Point">
<property name="x"
value="0" />
<property name="y"
value="20" />
</bean>
</beans>
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