“So finden Sie die Länge eines Arrays in Java” Code-Antworten

So finden Sie die Länge eines Arrays in Java

class Main {
  public static void main(String[] args) {
    // Creating an array called x.
    String[] x = new String[]{"This", "Should", "return", "4"};
    // "x.length" finds the length of the array "x".
    System.out.println(x.length);
    // returns 4
  }
}
Enchanting Elephant

Arraylänge in Java

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
System.out.println(cars[0]);

// Change elements in array
cars[0] = "Opel";
System.out.println(cars[0]);

// Length of array
System.out.println(cars.length);

// Loop through array
for (int i = 0; i < cars.length; i++) {
  System.out.println(cars[i]);
}
The Cat Coder

So überprüfen Sie die Größe von Arrayin Java

if ( playerCt == playerList.length ) {
        // The number of players is already equal to the size of the array.
        // The array is full.  Make a new array that has more space.
    Player[] temp;   // A variable to point to the new array.
    temp = new Player[ 2*playerList.length ];  // Twice as big as the old array.
    for ( int i = 0; i < playerList.length; i++ ) {
        temp[i] = playerList[i];  // Copy item from old array into new array.
    }
    playerList = temp;  // playerList now points to the new, bigger array.    
}
// At this point, we know that there is room in the array for newPlayer.
playerList[playerCt] = newPlayer;
playerCt++;
GFr

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