Which two code fragments will execute the method doStuff() in a separate thread?()
1. class SuperFoo { 2. SuperFoo doStuff(int x) { 3. return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. //insert code here 9. } 下面哪三项分别插入到第8行,可以编译?()
1.class SuperFo{ 2. SuperFo doStuff(int x){ 3.return new SuperFo() 4.} 5.} 6. 7.class Foo extends SuperFo{ 8.//insert code here 9.} 和四个声明: Foo doStuff(int x){return new Foo();} Foo doStuff(int x){return new SuperFoo();} SuperFoo doStuff(int x){return new foo();} SuperFoo doStuff(int y){return new SuperFoo();} 分别插入到第8行,有几个可以通过编译 ()
Which two code fragments will execute the method doStuff() in a separate thread?()
现有: 1.class SuperFoo{ 2.SuperFoo doStuff (int x) { 3.return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. //insert code here 9. } 和四个声明: Foo doStuff (int x) { return new Foo(); } Foo doStuff (int x) { return new SuperFoo(); } SuperFoo doStuff(int x) { return new Foo(); } SuperFoo doStuff(int y) { return new SuperFoo(); } 分别插入到第8行,有几个可以通过编泽?()