單項(xiàng)選擇題

What writes the text “ ” to the end of the file “file.txt”？（）

A. OutputStream out= new FileOutputStream （“file.txt”）；      Out.writeBytes （“ /n”）；
B. OutputStream os= new FileOutputStream （“file.txt”， true）；      DataOutputStream out = new DataOutputStream（os）； out.writeBytes （“ /n”）；
C. OutputStream os= new FileOutputStream （“file.txt”）；      DataOutputStream out = new DataOutputStream（os）； out.writeBytes （“ /n”）；
D. OutputStream os= new OutputStream （“file.txt”， true）；    DataOutputStream out = new DataOutputStream（os）； out.writeBytes （“ /n”）；

你可能感興趣的試題

單項(xiàng)選擇題

Which constructs a DataOutputStream？（）

A. New dataOutputStream（“out.txt”）；
B. New dataOutputStream（new file（“out.txt”））；
C. New dataOutputStream（new writer（“out.txt”））；
D. New dataOutputStream（new FileWriter（“out.txt”））；
E. New dataOutputStream（new OutputStream（“out.txt”））；
F. New dataOutputStream（new FileOutputStream（“out.txt”））；

單項(xiàng)選擇題

The file “file.txt” exists on the file system and contsins ASCII text. Given：
try {
File f = new File（“file.txt”）；
OutputStream out = new FileOutputStream（f， true）；
}
catch （IOException） {}
What is the result？（）

A. The code does not compile.
B. The code runs and no change is made to the file.
C. The code runs and sets the length of the file to 0.
D. An exception is thrown because the file is not closed.
E. The code runs and deletes the file from the file system.

What writes the text “ ” to the end of the file “file.txt”？（）

你可能感興趣的試題

Which constructs a DataOutputStream？（）

The file “file.txt” exists on the file system and contsins ASCII text. Given： try { File f = new File（“file.txt”）； OutputStream out = new FileOutputStream（f， true）； } catch （IOException） {} What is the result？（）

What writes the text “ ” to the end of the file “file.txt”？（）

Which constructs a DataOutputStream？（）

The file “file.txt” exists on the file system and contsins ASCII text. Given：
try {
File f = new File（“file.txt”）；
OutputStream out = new FileOutputStream（f， true）；
}
catch （IOException） {}
What is the result？（）