public class Demo {

    public static void main(String[] args) {

        float[][] matrix = { { 2.43f, 4.34f, 5.543f, 5.433f, 43.4343f },
                { 2.54f, 67.87f, 678.6786f, 68.86f, 78.67f },
                { 6.59f, 5.89f, 5.69f, 6.21f, 1.25f } };
        String floatNumbers = "";

        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[i].length; j++) {
                floatNumbers += String.format("%.2f ", matrix[i][j]);
            }
            floatNumbers += "\n";
        }
        System.out.println(floatNumbers);
    }
}