Calculation hit probability in battleship game in 2d array

getHitProbability.js

function getHitProbability(R, C, G) {
  // Write your code here
  let empty = 0;
  let filled = 0;
  let tot = R*C
  
  for(let i = 0; i < R; i++){
    for(let j = 0; j < C; j++){
      G[i] && G[i][j] === 1 ? filled++ : empty++
    }
  }
  
  let prob = filled / tot
  
  return prob.toFixed(6);
}

how to do this in java?