用java输出一个三角形
public class TestDemo01 {
public static void main(String[] args) {
//三角形 五行
for (int i = 1;i<=5;i++){
for (int j = 5;j>=i;j--){
System.out.print(" ");
}
for (int j = 1;j<=i;j++){
System.out.print("*");
}
for (int j =1;j<i;j++){
System.out.print("*");
}
System.out.println( );
}
}
}