I am making a maze game in java where you have to escape the maze without being caught by the random moving ai. The code i am using to decide which direction the enemy moves is shown below but this causes the character to change direction way too fast. It currently chooses a random number and depending on which number it chooses corresponds to which direction the ai moves. How can i edit this method so it only chooses a random number every 3 seconds?

if(new Random().nextInt(4) == 0){ xMove = speed; } if(new Random().nextInt(4) == 1){ xMove = -speed; } if(new Random().nextInt(4) == 2){ yMove = speed; } if(new Random().nextInt(4) == 3){ yMove = -speed; }

I am making a maze game in Java, where you have to escape the maze without being caught by the randomly-moving AI. 

The code I am using to decide which direction the enemy moves in causes the character to change direction way too fast. It currently chooses a random number, which corresponds to the direction in which the AI moves. 

How can I edit this method so it only chooses a random number every 3 seconds?

if(new Random().nextInt(4) == 0){
    xMove = speed;
}
if(new Random().nextInt(4) == 1){
    xMove = -speed;
}
if(new Random().nextInt(4) == 2){
    yMove = speed;
}
if(new Random().nextInt(4) == 3){
    yMove = -speed;
}