Im trying to find the length of a array of strings but cince the variable string already contains the length function, it gives me an error. Does anyone know how to find the length of a array of strings?

 

Here is my code:

 

char screentext[][] = new char[101][31];
PFont font,font30;
int x,y;
int blink;
String file;
void setup(){
  size(1000,600);
  font   = loadFont("CourierNewPSMT-12.vlw");
  font30 = loadFont("CourierNewPSMT-30.vlw");
  textFont(font, 15);
  file = selectInput();
}
void draw(){
  fill(0,255,0);
  stroke(0,255,0);
  String board[] = loadStrings(file);
  for(int i=board.length; i>board.length-6; i--){
    text(board[i],10,290-i*10);
  }
  textFont(font, 15);
  blink = blink+1;
  x=constrain(x,0,99);
  y=constrain(y,0,29);
  background(0);
  fill(0,255,0);
  stroke(0,255,0);
  for(int i=0; i<30; i++){
    for(int j=0; j<100; j++){
      text(screentext[j][i],j*10,i*10+310);
    }
  }
  if(blink < 20){
    stroke(0,255,0);
    line(x*10,y*10+300,x*10,y*10+310);
    /*
    for(int i=0; i<10; i++){
      for(int j=0; j<10; j++){
       
        //x*10+i,y*10+300+j
      }
    }
    */
  }
  if(blink > 40){
    blink = 0;
  }
  stroke(0,255,0);
  line(0,300,width,300);
  if(mouseX >= 10 && mouseX <= 110 && mouseY >= 10 && mouseY <= 60){
    fill(0,255,0);
    if(mousePressed){
      stroke(0);
      send();
    }else{
      stroke(0,255,0);
    }
  }else{
    noFill();
    stroke(0,255,0);
  }
  rect(10,10,100,50);
  if(mouseX >= 10 && mouseX <= 110 && mouseY >= 10 && mouseY <= 60){
    fill(0);
  }
  textFont(font30, 30);
  smooth();
  text("send",25,40);
  noSmooth();
}
void keyPressed(){
  if(keyCode != LEFT && keyCode != RIGHT && keyCode != UP && keyCode != DOWN && keyCode != SHIFT && keyCode != BACKSPACE){
    screentext[x][y] = key;
  }
  if(keyCode == UP){
    y--;
    blink = 0;
  }else if(keyCode == DOWN){
    y++;
    blink = 0;
  }else if(keyCode == LEFT){
    x--;
    blink = 0;
  }else if(keyCode == RIGHT){
    x++;
    blink = 0;
  }else if(keyCode == BACKSPACE){
    if(x>0){
      x--;
    }
    if(y>0 && x==0){
      y--;
    }
    screentext[x][y] = ' ';
  }else if(keyCode == ENTER){
    y++;
    x=0;
  }else if(keyCode == TAB){
    x=x+3;
  }else if(keyCode == SHIFT){
   
  }else{
    x++;
  }
}
boolean mouseisin(int x1, int y1,int x2,int y2) {
  if(mouseX > x1 && mouseX < x2 && mouseY > y1 && mouseY < y2) {
    return true;
  }
  else {
    return false;
  }
}
color invert(color input) {
  return color(255-red(input),255-green(input),255-blue(input));
}
void send(){
  String temp_save[] = loadStrings(file);
  String temp_extend[] = new String[temp_save.length() + 1];
  for(i=0; i<temp_save.length+1; i++){
    temp_extend[i] = temp_save[i];
  }
  String temp_submit;
  for(int i=0; i<30; i++){
    for(int j = 0; j<100; j++){
      temp_submit = temp_submit + screentext[j][i];
    }
  }
  temp_submit=trim(temp_submit);
  temp_extend[temp_extend.length()] = temp_submit;
  saveStrings(file, temp_extend());
}