问答题

请完善程序(程序文件名：Java_3.java)并进行调试。请在下画线处填入正确内容，然后删除下画线。请勿删除注释行和其他已有的语句内容。 [题目要求] 统计一个英文文本字符串包含的英文元音字母的个数，使程序的运行结果如下： The text contained vowels:88 源程序： public class Java_3 { public static void main(String[] args) { String text = " Beijing, the Capital City, is the political, " + "cultural and diplomatic centre of China. It has" + "become a modern international cosmopolitan city" + " with more than 11 million people. The Capital" + " International Airport, 23.5 km from the city centre," + "is China’s largest and most advanced airport. " ; int vowels =0; int (1) = text.length(); for(int i = 0;i＜textLength; i++) { char ch=Character.toLowerCase( text. (2) ); if(ch==’a’||ch==’e’||ch==’i’||ch==’o’||ch==’u’) (3) ; } System.out.println( "The text contained vowels:" + vowels +"\n"); } }