小编tim*_*tim的帖子

我希望JLabelitem3位于底部JPanel,因为有时它出现在我在窗口中的2d数组的顶部.我试着用 item3.setVerticalAlignment(JLabel.BOTTOM).方法,但它没有奏效.有什么建议？

public class Sokoban extends JPanel {

private Contents[][] field;
private Rectangle2D.Double r1;
private static final Color[] colours = {
        Color.BLACK, Color.RED, Color.GREEN, Color.CYAN, Color.MAGENTA, Color.BLUE, Color.YELLOW
    };

private LevelReader lr = new LevelReader();
private int currentLevel;
private Contents [][] levelData;
private int countMoves = 1;
JLabel item3 = new JLabel("ccc");


long time1;


public Sokoban(){
    lr.readLevels("m1.txt");

    this.setPreferredSize(new Dimension(900,500));
    this.setFocusable(true);
    this.requestFocus();
    this.addKeyListener(new MyKeyListener());
    initLevel(0);
    this.add(item3);
    item3.setVerticalAlignment(JLabel.BOTTOM);





}

public static void main (String[] args) {
    JFrame …

我只是想创建一个简短的java程序来向用户请求一个int,然后将3添加到该int并显示它.出于某种原因,我得到的语法都错了.

import java.util.Scanner;

public class test {


    public int attempt (int b) {
            return 3+entry;
    }


    int r = attempt(entry);

    public static void main (String[] args){
            Scanner keyboard = new Scanner(System.in);

            System.out.println ("Enter single digit int ");
            int entry = keyboard.nextInt();


            System.out.println("Your number is " + entry);
            System.out.println("Your number is " );

            System.out.println("The final result is " + r);

            }


}