发布时间 : 星期一 文章java鏈熸湯鑰冭瘯棰?- 鐧惧害鏂囧簱更新完毕开始阅读a0ac9b05250c844769eae009581b6bd97e19bcf1
{ public static void main(String args[])
{ new FrameOut(); }
}
class FrameOut extends Frame // Frame为系统定
{ Button btn; // FrameOut( )
{ super(\按钮\
btn = new Button(\按下我\
setLayout(new FlowLayout( ));
add(btn);
setSize(300,200);
show( );
}
}
4、import java.io.*;
public class abc
义的窗框类
{ public static void main(String args[])
{ SubClass sb = new SubClass( );
}
}
class SuperClass
{ int a = 10 , b = 20 ; }
class SubClass extends SuperClass
{ int max( ) { return ((a>b)?a:b); } }
四、写出下面程序的运行结果(每小题10分，共30分)
1、 import java.io.*;
public class abc
{ public static void main(String args[ ])
{ AB s = new AB(\
}
}
class AB {
String s1;
String s2;
AB( String str1 , String str2 )
{ s1 = str1; s2 = str2; }
public String toString( )
{ return s1+s2;}
}
2、 import java.io.* ;
public class abc
{
public static void main(String args[ ])
{ int i , s = 0 ;
int a[ ] = { 10 , 20 , 30 , 40 , 50 , 60 , 70 , 80 , 90 };
for ( i = 0 ; i < a.length ; i ++ )
if ( a[i]%3 = = 0 ) s += a[i] ;
}
}
3、import java.io.* ;
public class abc
{
public static void main(String args[ ])
)
}
class SubClass extends SuperClass
{ int c;
SubClass(int aa,int bb,int cc)
{ super(aa,bb);
c=cc;
}
}
class SubSubClass extends SubClass
{ int a;