?? countwriter.java
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import java.io.*;public class CountWriter extends FilterWriter { private int count = 0; private char lookFor = 0; public CountWriter(Writer in, char lookFor) { super(in); this.lookFor = lookFor; } public void write(int character) throws IOException { super.write(character); if ((char)character == lookFor) { count++; } } public void write(char[] cbuf) throws IOException { super.write(cbuf); int length = cbuf.length; for (int i = 0; i < length; i++) { if (cbuf[i] == lookFor) { count++; } } } public void write(char[] cbuf, int off, int len) throws IOException { super.write(cbuf, off, len); int length = cbuf.length; for (int i = 0; i < length; i++) { if (cbuf[i] == lookFor) { count++; } } } public void write(String str) throws IOException { super.write(str); int length = str.length(); for (int i = 0; i < length; i++) { if (str.charAt(i) == lookFor) { count++; } } } public void write(String str, int off, int len) throws IOException { super.write(str, off, len); int length = str.length(); for (int i = 0; i < length; i++) { if (str.charAt(i) == lookFor) { count++; } } } public int getCount() { return count; }}?? 快捷鍵說明
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