/* Modified version of http://www.roseindia.net/tutorial/java/corejava/nio/IntBufferIsDirect.html * Testcase below throws exception using gij and gnu classpath javac IntIsDirect.java # gcj gij + classpath Output: gij IntIsDirect Exception in thread "main" java.lang.NoSuchMethodError: method java.nio.Buffer.isDirect with signature ()Z was not fou…

IntIsDirect.java

/* Modified version of http://www.roseindia.net/tutorial/java/corejava/nio/IntBufferIsDirect.html
 * Testcase below throws exception using gij and gnu classpath
gcj gij + classpath Output:
gij IntIsDirect
Exception in thread "main" java.lang.NoSuchMethodError: method java.nio.Buffer.isDirect with signature ()Z was not found.
   at IntIsDirect.main(IntIsDirect.java:12)

OpenJDK output:
java IntIsDirect 
((Buffer)int buffer) is direct.
int buffer is direct.
((Buffer)int buffer) is not direct.
int buffer is not direct.
 */

import java.nio.*;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;

public class IntIsDirect {
  public static void main(String[] argv){
    ByteBuffer b = ByteBuffer.allocateDirect(512);
    IntBuffer i = b.asIntBuffer();

    // Type cast of IntBuffer to Buffer throws exception using gij + classpath
    // when calling .isDirect
    if (((Buffer)i).isDirect()) {
        System.out.println("((Buffer)int buffer) is direct.");
    } else {
        System.out.println("((Buffer)int buffer) is not direct.");
    }

 
    if (i.isDirect()) {
        System.out.println("int buffer is direct.");
    } else {
        System.out.println("int buffer is not direct.");
    }


    int[] array = new int[] {1,2,3,4,5};
    IntBuffer intBuf = IntBuffer.wrap(array);

    // Type cast of IntBuffer to Buffer throws exception using gij + classpath
    // when calling .isDirect
    if (((Buffer)intBuf).isDirect()) {
       System.out.println("((Buffer)int buffer) is direct.");
    } else {
       System.out.println("((Buffer)int buffer) is not direct.");
    }

    if (intBuf.isDirect()) {
       System.out.println("int buffer is direct.");
    } else {
       System.out.println("int buffer is not direct.");
    } 
  }
}