如何设置滚动条的长度

xiongwenhua365 2008-10-15 04:53:34



import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class AdjustTest implements AdjustmentListener

{

	JFrame jf=new JFrame("adjustmentevent测试");

	

	Panel p=new Panel();

	Scrollbar sb;

	public AdjustTest()

	{

		sb=new Scrollbar(Scrollbar.VERTICAL , 0,20, 0,500);

		sb.setSize(50,50);//这条语句好像没用啊，

		sb.addAdjustmentListener(this);

		p.add(sb);

		jf.add(p);

		jf.setSize(200,200);

		jf.setLocation(300,300);

		jf.setVisible(true);

		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

	public void adjustmentValueChanged(AdjustmentEvent e)  

	{

		Scrollbar ss=(Scrollbar)e.getAdjustable();

		System.out.println(ss.getValue());

	}

	public static void main(String[] args)

	{

		AdjustTest at=new AdjustTest();

	}

}

滚动条不够长，看起不不舒服，如何才能把它变长了点了，

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huoyin 2008-10-16

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;



public class AdjustTest implements AdjustmentListener {

	JFrame jf = new JFrame("adjustmentevent测试");



	Panel p = new Panel();



	Scrollbar sb;



	public AdjustTest() {

		sb = new Scrollbar(Scrollbar.VERTICAL, 0, 20, 0, 500);

		GridBagConstraints c = new GridBagConstraints();

		c.fill = GridBagConstraints.BOTH;

        c.weighty = 1.0;

		sb.addAdjustmentListener(this);

		p.setLayout(new GridBagLayout());

		p.add(sb, c);

		jf.add(p);

		jf.setSize(200, 200);

		jf.setLocation(300, 300);

		jf.setVisible(true);

		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}



	public void adjustmentValueChanged(AdjustmentEvent e) {

		Scrollbar ss = (Scrollbar) e.getAdjustable();

		System.out.println(ss.getValue());

	}



	public static void main(String[] args) {

		AdjustTest at = new AdjustTest();

	}

}

java__king 2008-10-15

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没用过,学习.

justinavril 2008-10-15

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它会自动调节的吧...你可以设置一个首选的大小：setPreferredSize

bluesmile979 2008-10-15

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setpreffersize()?记不太清楚大概是这样的名字。

setminsize()

一般以上两个可以控制大小，

setmaxsize()

horizonlyhw 2008-10-15

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class AdjustTest implements AdjustmentListener

{

    JFrame jf=new JFrame("adjustmentevent測試");

    

    Panel p=new Panel();

    

    Scrollbar sb;

    public AdjustTest ()

    {

    	p.setLayout(null);

        sb=new Scrollbar(Scrollbar.VERTICAL , 0,20, 0,500);

        sb.setBounds(new Rectangle(0,0,10,150));

        sb.addAdjustmentListener(this);

        p.add(sb);

        jf.add(p);

        jf.setSize(200,200);

        jf.setLocation(300,300);

        jf.setVisible(true);

        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

    public void adjustmentValueChanged(AdjustmentEvent e)  

    {

        Scrollbar ss=(Scrollbar)e.getAdjustable();

        System.out.println(ss.getValue());

    }

    public static void main(String[] args)

    {

        AdjustTest at=new AdjustTest();

    }

}