,l2,l3,l4,l5,l6;
private TextField tf1,tf2,tf3,tf4,tf5,tf6;
private Button btn1,btn2,b1;
private GridBagLayout...TextField(20);
tf4=new TextField(20);
tf5=new TextField(20);
tf6=new TextField(20);
gb=new GridBagLayout...Frame my;
String b;
private Label a1;
private Button b1,b2;
private TextField c1;
private GridBagLayout...min;
private String s;
private TextArea m1;
Frame c1,c2;
private Button b1,b2,b3,b4,b5;
private GridBagLayout...gb;
private GridBagConstraints gbc;
public GUIOutnum() {
gb=new GridBagLayout(); //初始化 gb