java安卓@Override问题
我的Libgdx应用程序使用的是Java1.7,但我发现我遇到了很多“@Override”错误。所以在网上搜索之后,我发现我应该使用Java 1.6兼容性来防止这个错误。进入窗口后->;偏好->;java->;编译器,并将兼容性更改为1.6,我发现仍然收到@Override错误(该方法…必须重写超类方法)
知道为什么这种情况还会发生吗? 我真的需要为一个函数指定“@Override”来覆盖并按照接口/主类的计划执行吗
如果有帮助,下面是代码:
package cowdawg.libgdx.namespace;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.khronos.opengles.GL10;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.files.*;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.graphics.GL11;
import com.badlogic.gdx.graphics.Mesh;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.Texture.TextureWrap;
import com.badlogic.gdx.graphics.g3d.loaders.obj.ObjLoader;
public class LifeCycle implements ApplicationListener {
String head;
Mesh model;
private PerspectiveCamera camera;
@Override
public void create() {
//super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
InputStream stream = null;
try
{
stream = Gdx.files.internal("Head/Head.obj").read();
model = ObjLoader.loadObj(stream,true);
stream.close();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Gdx.gl.glEnable(GL10.GL_DEPTH_TEST);
Gdx.gl10.glTranslatef(0.0f, 0.0f, -3.0f);
//Mesh m;
//InputStream in = Gdx.files.internal("data/cube.obj").read();
//m = ObjLoader.loadObj(in);
//m.render(GL10.GL_TRIANGLES);
}
@Override
public void dispose(){
}
@Override
public void pause(){
}
protected int lastTouchX;
protected int lastTouchY;
protected float rotateZ = 0.01f;
protected float increment = 0.01f;
@Override
public void render()
{
Gdx.gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
camera.update();
camera.apply(Gdx.gl10);
Gdx.gl10.glTranslatef(0.0f, 0.0f, -3.0f);
Gdx.gl10.glRotatef(rotateZ, rotateZ, 5.0f, rotateZ);
model.render(GL10.GL_TRIANGLES);
if (Gdx.input.justTouched())
{
}
else if (Gdx.input.isTouched())
{
}
rotateZ += increment;
System.out.println(""+rotateZ);
}
@Override
public void resize()
{
}
@Override
public void resume()
{
}
@Override
public void resize(int arg0, int arg1) {
// TODO Auto-generated method stub
}
}
# 1 楼答案
不,这是可选的,应该会生成警告
另一方面,Androids API强制您(并生成运行时错误)为某些方法调用super。看这里Android Activity which overridden functions must call super.*
# 2 楼答案
注释只是一种安全机制。这只是给编译器的一个提示,该方法旨在重写父方法。如果该方法不是父方法的重写,则会触发编译器错误
使用它是
optional
,但对于检测方法名/参数输入错误可能很有用