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1: /* 2: * Written by Doug Lea with assistance from members of JCP JSR-166 3: * Expert Group and released to the public domain, as explained at 4: * http://creativecommons.org/licenses/publicdomain 5: */ 6: 7: package java.util.concurrent; 8: 9: /** 10: * A task that returns a result and may throw an exception. 11: * Implementors define a single method with no arguments called 12: * <tt>call</tt>. 13: * 14: * <p>The <tt>Callable</tt> interface is similar to {@link 15: * java.lang.Runnable}, in that both are designed for classes whose 16: * instances are potentially executed by another thread. A 17: * <tt>Runnable</tt>, however, does not return a result and cannot 18: * throw a checked exception. 19: * 20: * <p> The {@link Executors} class contains utility methods to 21: * convert from other common forms to <tt>Callable</tt> classes. 22: * 23: * @see Executor 24: * @since 1.5 25: * @author Doug Lea 26: * @param <V> the result type of method <tt>call</tt> 27: */ 28: public interface Callable<V> { 29: /** 30: * Computes a result, or throws an exception if unable to do so. 31: * 32: * @return computed result 33: * @throws Exception if unable to compute a result 34: */ 35: V call() throws Exception; 36: }
GNU Classpath (0.97.2) |