Error: JAVA_HOME is not defined correctly - after maven installation

Question

I've been trying to calculate a reflection velocity of a particle (Circle2D) against a platform's normal vector.

Vector2D reflect(Vector2D vector, Vector2D normal) {
    double velocityDotProduct = Vector2D.dot(normal, vector);
    Vector2D reflectVector = new Vector2D(vector.getX() - 2 * velocityDotProduct * normal.getX(), vector.getY() - 2 * velocityDotProduct * normal.getY());
    return reflectVector;
}

This is returning the correct x velocity but is giving a tiny y velocity.

Before: x=5.0 y=20.39999999999999
After: x=5.000000009209657 y=-1.5040509959999993E8

Thanks, Jacob

Solution

You should add these lines to your ~/.pam_environment file instead (create it if it doesn't exist)

PATH DEFAULT=${PATH}:/opt/jdk1.7.0_40/jdk1.7.0_40/bin
JAVA_HOME DEFAULT=/opt/jdk1.7.0_40/jdk1.7.0_40

More information (read this)

Using .bashrc is not recommended at the above link.

Comments

[catch23]

@minerz029 I first time here about this things. Can you explain more about this things? How do really to write this variable? Can you show one at this example?

[juggernauthk108]

try sudo ./mkdistro

[catch23]

Perfect I did this and my output is Apache Maven 3.0.4 .... Why was this happen?

[Hakeem Wahab]

because most of java based applicatons need this variable to know the java path