public class MultiplicationTable { public static void main(String[] args) { for ( int j= 1 ; j<= 9 ; j++) { for ( int i = 1 ; i <= j; i++) { System. out .print(i + "*" + j + "=" + i * j + " \t " ); } System. out .println(); } } }
for-each // 遍 历数组 public class ForDemo { public static void main(String[] args) { int [] numbers = { 10 , 20 , 30 , 40 , 50 }; for ( int i= 0 ;i< 5 ;i++){ System. out .println(numbers[i]); } System. out .println( "==============" ); for ( int j:numbers){ System. out .println(j); } } }