example04_str.java

java课程设计教材上的程例题序代码

package example;

import java.util.StringTokenizer;

import javax.swing.JOptionPane;

public class Example04_Str {
	public static void main(String[] args) {
		String para = JOptionPane.showInputDialog(null, "Input a line English sentence");
		String delim = "\n ,.!?;"; //定义分隔符集
		StringTokenizer strToken = new StringTokenizer(para, delim);
		int a = 0;
		int an = 0;
		int the = 0;

		while (strToken.hasMoreTokens()) {
			String token = strToken.nextToken().toLowerCase();

			if (token.equals("a"))
				a++;

			if (token.equals("an"))
				an++;

			if (token.equals("the"))
				the++;
		}

		String mes = "";
		mes += "The length = " + para.length() + "\n";
		mes += "a = " + a + "\n";
		mes += "an = " + an + "\n";
		mes += "the = " + the + "\n";
		JOptionPane.showMessageDialog(null, mes);
	}
}