1.正
for (int i = 1; i <=9 ; i++) {
for (int j = 1; j <=i ; j++) {
System.out.print(j+"x"+i+"="+i*j+"\t");
}
System.out.println();
}
2.倒
for (int i = 9; i >=1 ; i--) {
for (int j = 1; j <=i ; j++) {
System.out.print(j+"x"+i+"="+j*i+"\t");
}
System.out.println();
}
3.反倒
for (int i=9;i>=1;i--){
for (int k=1;k<=2*(9-i);k++){
System.out.print("\t");
}
for (int j=1;j<=i;j++){
System.out.print(j+"*"+i+"="+j*i+"\t");
}
System.out.println();
}
4.反正
for (int i = 1; i <= 9; i++) {
for (int k = 1; k <= 2 * (9 - i); k++) {
System.out.print("\t");
}
for (int j = 1; j <= i; j++) {
System.out.print(j + "*" + i + "=" + j * i + "\t");
}
System.out.println();
}