jdk-24/test/langtools/tools/javap/T8033711.java

/*
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8033711
 * @summary An exception is thrown if using the "-classpath" option with no arguments
 * @modules jdk.jdeps/com.sun.tools.javap
 */

import java.io.*;

public class T8033711 {
    public static void main(String[] args) throws Exception {
        new T8033711().run();
    }

    public void run() throws Exception {
        String out = javap("-classpath");
        if (out.contains("IllegalArgumentException"))
            throw new Exception("exception found in javap output");
        if (!out.contains("Error: invalid use of option"))
            throw new Exception("expected error message not found in javap output");
    }

    String javap(String... args) {
        StringWriter sw = new StringWriter();
        PrintWriter out = new PrintWriter(sw);
        int rc = com.sun.tools.javap.Main.run(args, out);
        out.close();
        System.out.println(sw.toString());
        System.out.println("javap exited, rc=" + rc);
        return sw.toString();
    }
}