编译器报错:500Exception in thread "main" .compareTo(java.lang.ArrayIndexOutOfBoundsException: 1
at v1ch06.TraceHandler.invoke(ProxyTest.java:51)
at com.sun.proxy.$Proxy0.compareTo(Unknown Source)
at java.util.Arrays.binarySearch0(Arrays.java:2439)
at java.util.Arrays.binarySearch(Arrays.java:2379)
at v1ch06.ProxyTest.main(ProxyTest.java:25)
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package v1ch06;import java.lang.reflect.*;
import java.util.*;/**
* This program demonstrates the use of proxies.
* @author Norshtein
*
*/
public class ProxyTest {
public static void main(String[] args) {
Object[] elements = new Object[1000];
for (int i = 0; i < elements.length; i++)
{
Integer value = i + 1;
InvocationHandler handler = new TraceHandler(value);
Object proxy = Proxy.newProxyInstance(null, new Class[] { Comparable.class}, handler);
elements[i] = proxy;
}
Integer key = new Random().nextInt(elements.length) + 1;
int result = Arrays.binarySearch(elements, key);
if (result >= 0) System.out.println(elements[result]);
}
}class TraceHandler implements InvocationHandler {
private Object target;
public TraceHandler(Object t){
target = t;
}
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable
{
// print implicit argument
System.out.print(target);
// print method name
System.out.print("."+m.getName()+"(");
// print explicit arguments
if (args != null)
{
for (int i = 0; i < args.length; i++)
{
System.out.print(args[1]);
if (i < args.length - 1) System.out.print(", ");
}
}
System.out.print(")");
return m.invoke(target, args);
}
}
at v1ch06.TraceHandler.invoke(ProxyTest.java:51)
at com.sun.proxy.$Proxy0.compareTo(Unknown Source)
at java.util.Arrays.binarySearch0(Arrays.java:2439)
at java.util.Arrays.binarySearch(Arrays.java:2379)
at v1ch06.ProxyTest.main(ProxyTest.java:25)
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package v1ch06;import java.lang.reflect.*;
import java.util.*;/**
* This program demonstrates the use of proxies.
* @author Norshtein
*
*/
public class ProxyTest {
public static void main(String[] args) {
Object[] elements = new Object[1000];
for (int i = 0; i < elements.length; i++)
{
Integer value = i + 1;
InvocationHandler handler = new TraceHandler(value);
Object proxy = Proxy.newProxyInstance(null, new Class[] { Comparable.class}, handler);
elements[i] = proxy;
}
Integer key = new Random().nextInt(elements.length) + 1;
int result = Arrays.binarySearch(elements, key);
if (result >= 0) System.out.println(elements[result]);
}
}class TraceHandler implements InvocationHandler {
private Object target;
public TraceHandler(Object t){
target = t;
}
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable
{
// print implicit argument
System.out.print(target);
// print method name
System.out.print("."+m.getName()+"(");
// print explicit arguments
if (args != null)
{
for (int i = 0; i < args.length; i++)
{
System.out.print(args[1]);
if (i < args.length - 1) System.out.print(", ");
}
}
System.out.print(")");
return m.invoke(target, args);
}
}
key=长度随机在加1,是不是超长了