单项选择题
What will be the result of attempting to compile and run the following program?()
public class Q28fd {
public static void main(String args[]) {
int counter = 0;
l1:
for (int i=10; i<0; i--) {
l2: int j = 0;
while (j < 10) {
if (j > i) break l2;
if (i == j) {
counter++;
continue l1;
}
}
counter--;
}
System.out.println(counter);
}
}
A.The program will fail to compile.
B.The program will not terminate normally.
C.The program will write 10 to the standard output.
D.The program will write 0 to the standard output.
E.The program will write 9 to the standard output.
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多项选择题
Whicharevalididentifiers?()
A._class
B.$value$
C.zer@
D.¥ngstr
E.2muchuq -
单项选择题
Which method implementations will write the given string to a file named "file", using UTF8 encoding?() IMPLEMENTATION a: public void write(String msg) throws IOException { FileWriter fw = new FileWriter(new File("file")); fw.write(msg); fw.close(); } IMPLEMENTATION b: public void write(String msg) throws IOException { OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("file"), "UTF8"); osw.write(msg); osw.close(); } IMPLEMENTATION c: public void write(String msg) throws IOException { FileWriter fw = new FileWriter(new File("file")); fw.setEncoding("UTF8"); fw.write(msg); fw.close(); } IMPLEMENTATION d: public void write(String msg) throws IOException { FilterWriter fw = FilterWriter(new FileWriter("file"), "UTF8"); fw.write(msg); fw.close(); } IMPLEMENTATION e: public void write(String msg) throws IOException { OutputStreamWriter osw = new OutputStreamWriter( new OutputStream(new File("file")), "UTF8" ); osw.write(msg); osw.close(); }
A.Implementation a.
B.Implementation b.
C.Implementation c.
D.Implementation d.
E.Implementation e. -
多项选择题
Given the following code, which code fragments, when inserted at the indicated location, will succeed in making the program display a button spanning the whole window area?() import java.awt.*; public class Q1e65 { public static void main(String args[]) { Window win = new Frame(); Button but = new Button("button"); // insert code fragment here win.setSize(200, 200); win.setVisible(true); } }
A.win.setLayout(new BorderLayout()); win.add(but);
B.win.setLayout(new GridLayout(1, 1)); win.add(but);
C.win.setLayout(new BorderLayout()); win.add(but, BorderLayout.CENTER);
D.win.add(but);
E.win.setLayout(new FlowLayout()); win.add(but);
