以下案例分析了foreach迴圈和Java8 拉姆達表示式的區別

public static void main(String[] args) {
		
		/*
		 * foreach 和 list
		 */
		
		List<String> arrs = new ArrayList<>();
		
		arrs.add("a");
		arrs.add("b");
		arrs.add("c");
		arrs.add("d");
		arrs.add("e");
		arrs.add("f");
		
		
		for (String str : arrs) {
			System.out.print(str+",");
		}
		
		System.out.println();
		
		arrs.forEach(item->System.out.print(item+","));
		
		System.out.println();
		arrs.forEach(item->{
			if("a".equals(item)){
				System.out.println(item);
			}
		});
		
		/*
		 * foreach 和 map
		 */
		Map<String, Object> maps = new HashMap<>();
		maps.put("key1", "a");
		maps.put("key2", "b");
		maps.put("key3", "c");
		maps.put("key4", "d");
		maps.put("key5", "e");
		maps.put("key6", "f");
		
		for (Map.Entry<String, Object> entry : maps.entrySet()) {
			System.out.println(entry);
		}
		
		
		maps.forEach((k,v)->System.out.println("item:"+k+",value:"+v));
		
		maps.forEach((k,v)->{
			
			if("a".equals(v)){
				System.out.println(v);
			}