如何在jtextfield上迭代和打印Matrix？

import javax.swing.JFrame;
import javax.swing.JTextField;

public class MatrixPrinter {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Matrix Printer");
        frame.setSize(400, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(null);

        JTextField textField = new JTextField();
        textField.setBounds(50, 50, 300, 200);
        frame.add(textField);

        Matrix matrix = new Matrix(3, 3); // 创建一个3x3的矩阵
        matrix.setElement(0, 0, 1);
        matrix.setElement(0, 1, 2);
        matrix.setElement(0, 2, 3);
        matrix.setElement(1, 0, 4);
        matrix.setElement(1, 1, 5);
        matrix.setElement(1, 2, 6);
        matrix.setElement(2, 0, 7);
        matrix.setElement(2, 1, 8);
        matrix.setElement(2, 2, 9);

        String matrixString = matrix.toString(); // 将矩阵转换为字符串形式
        textField.setText(matrixString); // 设置JTextField的文本内容

        frame.setVisible(true);
    }
}

class Matrix {
    private int rows;
    private int columns;
    private int[][] elements;

    public Matrix(int rows, int columns) {
        this.rows = rows;
        this.columns = columns;
        this.elements = new int[rows][columns];
    }

    public void setElement(int row, int column, int value) {
        elements[row][column] = value;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < columns; j++) {
                sb.append(elements[i][j]).append("\t");
            }
            sb.append("\n");
        }
        return sb.toString();
    }
}