简单的 lambda 表达式求助

[Ununennium]

//匿名内部类：
Runnable r = new Runnable() {
            @Override
            public void run() {
                
            }
        };
        
        
//改写成 lambda 表达式：
Runnable r = new Runnable(()->{});

无法通过编译，提示“'Runnable' is abstract; cannot be instantiated”


请问问题出在哪，非常感谢~

[nthin0]

Runnable r = () -> {};

[Ununennium]

@nthin0 谢谢大佬，但是为啥不用写 new runnable()啊

[ninjachen]

因为它不是 lambda 表达式

[brust]

Runnable r = ()->{};
Thread t = new Thread(new Runnable() {
@Override
public void run() {

}
});
Thread t = new Thread(()->{});

[zm8m93Q1e5otOC69]

不用加 new 了吧 ()->{}就是 new 了