代码改错(有正确的)

第1题

abstract class Name {
    private String name;
    public abstract boolean isStupidName(String name) {}
}

第2题

public class Something {
    void doSomething () {
        private String s = "";
        int l = s.length();
    }
}

第3题

abstract class Something {
    private abstract String doSomething ();
}

第4题

public class Something {
    public int addOne(final int x) {
        return ++x;
    }
}

第5题

public class Something {
    public static void main(String[] args) {
        Other o = new Other();
        new Something().addOne(o);
    }
    public void addOne(final Other o) {
        o.i++;
    }
}
class Other {
    public int i;
}

第6题

class Something {
    int i;
    public void doSomething() {
        System.out.println("i = "+ i);
    }
}

第7题

class Something {
    final int i;
    public void doSomething() {
        System.out.println("i = "+ i);
    }
}

第8题

public class Something {
    public static void main(String[] args) {
        Something s = new Something();
        System.out.println("s.doSomething() returns " + doSomething());
    }
    public String doSomething() {
        return "Do something ...";
    }
}

第9题

Something 类的文件名叫 OtherThing.java

class Something {
    private static void main(String[] something_to_do){
        System.out.println("Dosomething ...");
    }
}

第10题

interface A {
    int x = 0;
}
class B {
    int x = 1;
}
class C extends B implements A {
    public void pX(){
        System.out.println(x);
    }
    public static void main(String[] args) {
        new C().pX();
    }
}

第11题

interface Playable {
    void play();
}
interface Bounceable {
    void play();
}
interface Rollable extends Playable, Bounceable {
    Ball ball = new Ball("PingPang");
}
class Ball implements Rollable {
    private String name;
    public String getName() {
        return name;
    }
    public Ball(String name) {
        this.name =name;
    }
    public void play() {
        ball = newBall("Football");
        System.out.println(ball.getName());
    }
}