访问修饰符

public class Foo {

private int i = -1;

public Foo(int i){
this.i = i;
}
public void method(Foo foo){
System.out.println(foo.i);
foo.echo();
}
private void echo(){
System.out.println(i);
}

}

public class Test {

public static void main(String[] args) {
Foo f1 = new Foo(11);
Foo f2 = new Foo(22);

f1.method(f2);
//22   22
}
}