import java.io.*;
class Test{
public static void main(String args[]){
try{
CharArrayWriter caWriter = new CharArrayWriter();
// 書き込み
caWriter.write("a");
caWriter.write("b");
caWriter.write("c");
// 内容取りだし
System.out.println(caWriter.toString());
// クローズ
caWriter.close();
}catch(Exception e){
System.err.println(e);
}
}
}
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