lx2_6.java

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public class Lx2_6
{
public static void main(String[] args)
{
StringBuffer search = new StringBuffer("peter piper picked a peck of pickled peppers");
int max = search.length();
int num = 0;
for (int i = 0; i < max; i++)
{
if (search.charAt(i)!= 'p')
continue;
num++;
search.setCharAt(i, 'P');
}
System.out.println("发现 " + num + "个 p在字符串中。");
System.out.println(search);
}
}