Read and write "T" for true and "F" for false

Read and write "T" for true and "F" for false

what do you mean?
Could you please describe the question chearly?

public static boolean isTrue(String str) throws Exception {
if (str.equals("T")) {
return true;
} else if (str.equals("F")) {
return false;
} else {
throw new Exception("不支持！");
}
}

public boolean read() throws Exception{
char c=(char)System.in.read();
if(c=='T') return true;
else return false;
}
public void write(boolean b){
if(b) System.out.println("T");
else System.out.println("F");
}