继承与ArrayStoreException

class F {//父类

private int a = 1;

int b = 1;

static int c = 0;

F() {

c += 1;

System.out.println("c=" + c);

}

public void show() {

System.out.println("Fa " + a + " Fb " + (b++)+" c " +c);

}

}

class Z extends F {//子类

int e = 4;

public void show() {

System.out.println("f " + e);

// super.show();

// super.show();

}

public void show2() {

System.out.println("f2 " + e);

}

}

public class T {

public static void main(String[] args) {

// Object x[] = new String[3];

// x[0] = new Integer(0); //java.lang.ArrayStoreException

Z[] z = new Z[3];

F[] f;

f= z;

// F[] f = new F[3];

// //Z[] z = f ; 编译不通过

for(int i=0;i<3;i++){

// z[i] = new F(); 编译不通过

// f[i] = new F(); // 编译通过，运行时异常 java.lang.ArrayStoreException

z[i] = new Z();// 与f[i] = new FF();结果相同

}

z[2].show2();

z[2].show(); f[2].show();//结果相同

}

}