86 lines
2.1 KiB
Java
86 lines
2.1 KiB
Java
/*
|
|
* Copyright 2000-2014 JetBrains s.r.o.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
package pkg;
|
|
|
|
import java.util.*;
|
|
import java.util.function.IntBinaryOperator;
|
|
import java.util.function.Supplier;
|
|
|
|
public class TestClassLambda {
|
|
|
|
public int field = 0;
|
|
|
|
public void testLambda() {
|
|
List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
|
|
int b = (int)Math.random();
|
|
|
|
list.forEach(n -> {
|
|
int a = 2 * n;
|
|
System.out.println(a + b + field);
|
|
});
|
|
}
|
|
|
|
public void testLambda1() {
|
|
int a = (int)Math.random();
|
|
Runnable r1 = () -> { System.out.println("hello1" + a); };
|
|
Runnable r2 = () -> { System.out.println("hello2" + a); };
|
|
}
|
|
|
|
public void testLambda2() {
|
|
reduce((left, right) -> Math.max(left, right));
|
|
}
|
|
|
|
public void testLambda3() { // IDEA-127301
|
|
reduce(Math::max);
|
|
}
|
|
|
|
public void testLambda4() {
|
|
reduce(TestClassLambda::localMax);
|
|
}
|
|
|
|
public void testLambda5() {
|
|
String x = "abcd";
|
|
function(x::toString);
|
|
}
|
|
|
|
public void testLambda6() {
|
|
List<String> list = new ArrayList<String>();
|
|
int bottom = list.size() * 2;
|
|
int top = list.size() * 5;
|
|
list.removeIf(s -> (bottom >= s.length() && s.length() <= top));
|
|
}
|
|
|
|
public static OptionalInt reduce(IntBinaryOperator op) {
|
|
return null;
|
|
}
|
|
|
|
public static String function(Supplier<String> supplier) {
|
|
return supplier.get();
|
|
}
|
|
|
|
public static int localMax(int first, int second) {
|
|
return 0;
|
|
}
|
|
|
|
public void nestedLambdas() {
|
|
int a =5;
|
|
Runnable r1 = () -> {
|
|
Runnable r2 = () -> { System.out.println("hello2" + a); };
|
|
System.out.println("hello1" + a);
|
|
};
|
|
}
|
|
}
|