手工电弧焊，507焊条怎么使用啊？
手工电弧焊，507焊条怎么使用啊？
507焊接时要直流反接 2.5 60-100 3.2 80-140 4.0 110-210 5.0 160-230
java卡片布局中show的正确使用方法
已修改，复制粘贴即可，
panelMain = new Panel (cl);// 被设定为卡片布局的面板
修改如上即可
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.CardLayout;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class Ceshi extends Frame
{
PanelF pf = new PanelF ();
PanelS ps = new PanelS ();
Panel panelMain, panelXZ;
Button btNext, btPrevious, bt1, bt2, bt3, bt4, bt5;
CardLayout cl;
Boolean w = false;
public Ceshi ()
{
cl = new CardLayout ();
panelMain = new Panel (cl);// 被设定为卡片布局的面板
panelXZ = new Panel ();// 构造放按钮的面板
btPrevious = new Button (上一页);
btNext = new Button (下一页);
bt1 = new Button (1);
bt2 = new Button (2);
// 给定义为卡片布局的面板添加面板
panelMain.add (pf, pf);
panelMain.add (ps, ps);
panelXZ.add (btPrevious);
panelXZ.add (btNext);
panelXZ.add (bt1);
panelXZ.add (bt2);
btPrevious.addActionListener (new ActionListener ()
{
@Override
public void actionPerformed ( ActionEvent e )
{
cl.previous (panelMain);
}
});
btNext.addActionListener (new ActionListener ()
{// 下一页的按钮
public void actionPerformed ( ActionEvent e )
{
cl.next (panelMain);
}
});
bt1.addActionListener (new ActionListener ()
{// 跳转到第二个面板的按钮
public void actionPerformed ( ActionEvent e )
{
cl.show (panelMain, pf);
}
});
bt2.addActionListener (new ActionListener ()
{// 跳转到第二个面板的按钮
public void actionPerformed ( ActionEvent e )
{
cl.show (panelMain, ps);
}
});
addWindowListener (new WindowAdapter ()
{
public void windowClosing ( WindowEvent wevent )
{
if (w)
dispose ();
else
System.exit (0);
}
});
panelXZ.setLayout (new FlowLayout ());
setTitle (主界面);
setSize (800, 600);
setLocationRelativeTo (null);
add (panelMain, BorderLayout.CENTER);// 把设为卡片布局的面板放置在窗体中间
add (panelXZ, BorderLayout.SOUTH);// 把带按钮的面板放置在底部
setVisible (true);
}
public static void main ( String args[] )
{
new Ceshi ();
}
}
// 第一个面板
class PanelF extends Panel
{
public PanelF ()
{
add (new Label (第一个面板));
}
}
// 第二个面板
class PanelS extends Panel
{
public PanelS ()
{
add (new Label (第二个面板));
}
}