题目内容

软化点是指沥青材料由黏塑状态转变为固体状态达到条件脆裂时的温度。（）

A. 对
B. 错

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Given the following statement, which statement will write "Calvin" to the file DiskFile.txt?给定以下语句，哪个语句将“Calvin”写入文件DiskFile.txt？PrintWriter diskOut = new PrintWriter("DiskFile.txt");

A. System.out.println(diskOut, "Calvin");
B. DiskFile.println("Calvin");
C. PrintWriter.println("Calvin");
D. diskOut.println("Calvin");

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When using the PrintWriter class, which of the following import statements would you write near the top of your program?使用PrintWriter类时，你需要在程序顶部附近写以下哪些语句？

A. import javax.swing.*;
B. import java.io.*;
C. import PrintWriter;
D. import java.file.*;

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Which of the following will open a file named MyFile.txt and allow you to append data to its existing contents?下列哪一个可以打开一个名为MyFile.txt的文件，并可以将数据追加到其现有内容中？

A. FileWriter fwriter = new FileWriter("MyFile.txt", true);PrintWriter outFile = new PrintWriter(fwriter);
B. FileWriter fwriter = new FileWriter("MyFile.txt");PrintWriter outFile = new PrintWriter(fwriter);
C. PrintWriter outfile = new PrintWriter("MyFile.txt", true);
D. PrintWriter outfile = new PrintWriter(true, "MyFile.txt");

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Assume that inputFile references a Scanner object that was used to open a file. Which of the following while loops shows the correct way to read data from t he file until the end of the file is reached?假设inputFile引用了Scanner对象。下列哪一项while循环显示了从文件读取数据直到到达文件结尾的正确方法？

A. while (inputFile != null){ … }
B. while (!inputFile.EOF){ … }
C. while (inputFile.hasNext()){ … }
D. while (inputFile.nextLine == " "){ … }

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软化点是指沥青材料由黏塑状态转变为固体状态达到条件脆裂时的温度。（ ）

A. 对 B. 错

Given the following statement, which statement will write "Calvin" to the file DiskFile.txt?给定以下语句，哪个语句将“Calvin”写入文件DiskFile.txt？PrintWriter diskOut = new PrintWriter("DiskFile.txt");

When using the PrintWriter class, which of the following import statements would you write near the top of your program?使用PrintWriter类时，你需要在程序顶部附近写以下哪些语句？

Which of the following will open a file named MyFile.txt and allow you to append data to its existing contents?下列哪一个可以打开一个名为MyFile.txt的文件，并可以将数据追加到其现有内容中？

软化点是指沥青材料由黏塑状态转变为固体状态达到条件脆裂时的温度。（）

A. 对
B. 错