源码展示

package java.util.function;

/**
 * Represents a supplier of results.
 *
 * There is no requirement that a new or distinct result be returned each
 * time the supplier is invoked.
 */
@FunctionalInterface
public interface Supplier<T> {

    /**
     * Gets a result.
     */
    T get();
}

示例

import java.util.function.Supplier;

public class Test {
    public static void main(String args[]) {
        Supplier<String > s = ()->{
            return "费哥哥，我爱你哦！";
        };
        System.out.println( s.get());
    }
}