import java.util.Scanner; import java.util.jar.JarOutputStream;

public class Main {

public static void main(String[] args) {
    System.out.println("1   2   3   4   5   6   7   8   9");
    System.out.println("-   -   -   -   -   -   -   -   -");
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= 9; j++) {
            if (i * j < 10) {
                System.out.print(i * j + "   ");
            } else {
                System.out.print(i * j + "  ");
            }

        }
        System.out.println();
    }
    System.out.println();
    System.out.println("1   2   3   4   5   6   7   8   9");
    System.out.println("-   -   -   -   -   -   -   -   -");
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= i; j++) {
            if (i * j < 10) {
                System.out.print(i * j + "   ");
            } else {
                System.out.print(i * j + "  ");
            }

        }
        System.out.println();
    }
    System.out.println();
    System.out.println("1   2   3   4   5   6   7   8   9");
    System.out.println("-   -   -   -   -   -   -   -   -");
    int space = 0;
    for (int i = 1;i<=9;i++){
        for (int j = 1;j<i;j++){
            if (i*j<10){
                System.out.print("    ");
            }else {
                System.out.print("    ");
            }
        }
        for (int k = i;k<=9;k++){
            if (i * k < 10) {
                System.out.print(i * k + "   ");
            } else {
                System.out.print(i * k + "  ");
            }
        }
        System.out.println();
    }
}

}

不是 -(短横线)，是 _ (下划线)