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Java Swing程序设计实战

程序员文章站 2022-06-16 09:16:57
一、按钮组件1.1 提交按钮组件package swing;import java.awt.*;import java.awt.event.*;import java.net.*;import jav...

一、按钮组件

1.1 提交按钮组件

package swing;

import java.awt.*;
import java.awt.event.*;
import java.net.*;

import javax.swing.*;

public class jbuttontest extends jframe {
	/**
	 * 
	 */
	private static final long serialversionuid = 1l;

	public jbuttontest() {
		url url = jbuttontest.class.getresource("imagebutton.jpg");
		icon icon = new imageicon(url);
		setlayout(new gridlayout(3, 2, 5, 5)); // 设置网格布局管理器
		container c = getcontentpane(); // 创建容器
		for (int i = 0; i < 5; i++) {
			// 创建按钮,同时设置按钮文字与图标
			jbutton j = new jbutton("button" + i, icon);
			c.add(j); // 在容器中添加按钮
			if (i % 2 == 0) {
				j.setenabled(false); // 设置其中一些按钮不可用
			}
		}
		jbutton jb = new jbutton(); // 实例化一个没有文字与图片的按钮
		jb.setmaximumsize(new dimension(90, 30)); // 设置按钮与图片相同大小
		jb.seticon(icon); // 为按钮设置图标
		jb.sethideactiontext(true);
		jb.settooltiptext("图片按钮"); // 设置按钮提示为文字
		jb.setborderpainted(false); // 设置按钮边界不显示
		jb.addactionlistener(new actionlistener() { // 为按钮添加监听事件
			public void actionperformed(actionevent e) {
				// 弹出确认对话框
				joptionpane.showmessagedialog(null, "弹出对话框");
			}
		});
		c.add(jb); // 将按钮添加到容器中

		settitle("创建带文字与图片的按钮");
		setsize(350, 150);
		setvisible(true);
		setdefaultcloseoperation(windowconstants.dispose_on_close);
	}

	public static void main(string args[]) {
		new jbuttontest();
	}
}

Java Swing程序设计实战

1.2 复选框组件

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class checkboxtest extends jframe {

    /**
     * 
     */
    private static final long serialversionuid = 1l;
    private jpanel panel1 = new jpanel();
    private jpanel panel2 = new jpanel();
    private jtextarea jt = new jtextarea(3, 10);
    private jcheckbox jc1 = new jcheckbox("1");
    private jcheckbox jc2 = new jcheckbox("2");
    private jcheckbox jc3 = new jcheckbox("3");
    public checkboxtest() {
        container c = getcontentpane();

        c.setlayout(new borderlayout());

        c.add(panel1, borderlayout.north);
        final jscrollpane scrollpane = new jscrollpane(jt);
        panel1.add(scrollpane);

        c.add(panel2, borderlayout.south);
        panel2.add(jc1);
        jc1.addactionlistener(new actionlistener() {
            public void actionperformed(actionevent e) {
                if (jc1.isselected())
                    jt.append("复选框1被选中\n");
            }
        });

        panel2.add(jc2);
        jc2.addactionlistener(new actionlistener() {
            public void actionperformed(actionevent e) {
                if (jc2.isselected())
                    jt.append("复选框2被选中\n");
            }
        });

        panel2.add(jc3);
        jc3.addactionlistener(new actionlistener() {
            public void actionperformed(actionevent e) {
                if (jc3.isselected())
                    jt.append("复选框3被选中\n");
            }
        });

        setsize(200, 160);
        setvisible(true);
        settitle("复选框的使用");
        setdefaultcloseoperation(windowconstants.exit_on_close);
    }

    public static void main(string[] args) {
        new checkboxtest();

    }

}

Java Swing程序设计实战

二、列表组件

2.1 jcombobox类

import java.awt.*;
import javax.swing.*;

public class jcomboboxmodeltest extends jframe {
	private static final long serialversionuid = 1l;
	jcombobox<string> jc = new jcombobox<>(new mycombobox());
	jlabel jl = new jlabel("请选择证件");

	public jcomboboxmodeltest() {
		setsize(new dimension(160, 180));
		setvisible(true);
		settitle("在窗口中设置下拉列表框");
		setdefaultcloseoperation(windowconstants.dispose_on_close);
		container cp = getcontentpane();
		cp.setlayout(new flowlayout());
		cp.add(jl);
		cp.add(jc);
	}

	public static void main(string[] args) {
		new jcomboboxmodeltest();

	}

}

class mycombobox extends abstractlistmodel<string> implements comboboxmodel<string> {
	/**
	 * 
	 */
	private static final long serialversionuid = 1l;
	string selecteditem = null;
	string[] test = { "身份证", "军人证", "学生证", "工作证" };

	public string getelementat(int index) {
		return test[index];
	}

	public int getsize() {
		return test.length;
	}

	public void setselecteditem(object item) {
		selecteditem = (string) item;
	}

	public object getselecteditem() {
		return selecteditem;
	}

	public int getindex() {
		for (int i = 0; i < test.length; i++) {
			if (test[i].equals(getselecteditem()))
				return i;
		}
		return 0;
	}
}

Java Swing程序设计实战

2.2 列表框组件

import java.awt.*;

import javax.swing.*;

public class jlisttest extends jframe {
	/**
	 * 
	 */
	private static final long serialversionuid = 1l;

	public jlisttest() {
		container cp = getcontentpane();
		
		cp.setlayout(null);
		jlist<string> jl = new jlist<>(new mylistmodel());
		jscrollpane js = new jscrollpane(jl);
		js.setbounds(10, 10, 100, 100);
		cp.add(js);
		settitle("在这个窗体中使用了列表框");
		setsize(200, 150);
		setvisible(true);
		setdefaultcloseoperation(windowconstants.dispose_on_close);
	}
	
	public static void main(string args[]) {
		new jlisttest();
	}
}

class mylistmodel extends abstractlistmodel<string> {
	/**
	 * 
	 */
	private static final long serialversionuid = 1l;
	private string[] contents = { "列表1", "列表2", "列表3", "列表4", "列表5", "列表6" };
	
	public string getelementat(int x) {
		if (x < contents.length)
			return contents[x++];
		else
			return null;
	}
	
	public int getsize() {
		return contents.length;
	}
}

Java Swing程序设计实战

三、文本组件

3.1 文本框组件

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class jtextfieldtest extends jframe {

	/**
	 * 
	 */
	private static final long serialversionuid = 1l;

	public jtextfieldtest() {
		setsize(250, 100);
		setdefaultcloseoperation(windowconstants.dispose_on_close);
		container cp = getcontentpane();
		getcontentpane().setlayout(new flowlayout());
		final jtextfield jt = new jtextfield("aaa", 20);
		final jbutton jb = new jbutton("清除");
		cp.add(jt);
		cp.add(jb);
		jt.addactionlistener(new actionlistener() {
			public void actionperformed(actionevent arg0) {
				// todo 自动生成方法存根
				jt.settext("触发事件");
			}
		});
		jb.addactionlistener(new actionlistener() {
			public void actionperformed(actionevent arg0) {
				jt.settext("");
				jt.requestfocus();
			}
		});
		setvisible(true);
	}

	public static void main(string[] args) {
		new jtextfieldtest();
	}
}

Java Swing程序设计实战

3.2 密码框

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class jtextfieldtest extends jframe {

	/**
	 * 
	 */
	private static final long serialversionuid = 1l;

	public jtextfieldtest() {
		setsize(250, 100);
		setdefaultcloseoperation(windowconstants.dispose_on_close);
		container cp = getcontentpane();
		getcontentpane().setlayout(new flowlayout());
//		final jtextfield jt=new jtextfield("aaa",20);
		jpasswordfield jp = new jpasswordfield("", 20);
		jp.setechochar('*');
		final jbutton jb = new jbutton("清除");

		cp.add(jp);
		cp.add(jb);
		jp.addactionlistener(new actionlistener() {
			public void actionperformed(actionevent arg0) {
				// todo 自动生成方法存根
				jp.settext("触发事件");
			}
		});
		jb.addactionlistener(new actionlistener() {
			public void actionperformed(actionevent arg0) {
				jp.settext("");
				jp.requestfocus();
			}
		});
		setvisible(true);
	}

	public static void main(string[] args) {
		new jtextfieldtest();
	}
}

Java Swing程序设计实战

3.3 文本域组件

import java.awt.*;
import javax.swing.*;

public class jtextareatest extends jframe {
	public jtextareatest() {
		setsize(200, 100);
		settitle("定义自动换行的文本域");
		setdefaultcloseoperation(windowconstants.exit_on_close);
		container cp = getcontentpane();
		jtextarea jt = new jtextarea("文本域", 6, 6);
		jt.setlinewrap(true);
		cp.add(jt);
		setvisible(true);
	}

	public static void main(string[] args) {
		new jtextareatest();

	}

}

Java Swing程序设计实战

四、常用时间监听器

4.1 动作事件监听器

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class simpleevent extends jframe {

	/**
	 * 
	 */
	private static final long serialversionuid = 1l;
	private jbutton jb = new jbutton("我是按钮,点击我");

	public simpleevent() {
		setlayout(null);
		setsize(200, 100);
		setdefaultcloseoperation(windowconstants.dispose_on_close);
		container cp = getcontentpane();
		cp.add(jb);
		jb.setbounds(10, 10, 100, 30);
		jb.addactionlistener(new jbaction());
		setvisible(true);
	}

	class jbaction implements actionlistener {
		public void actionperformed(actionevent arg0) {
			jb.settext("我被单击了");
		}
	}

	public static void main(string[] args) {
		new simpleevent();
	}
}

Java Swing程序设计实战

Java Swing程序设计实战

4.2 焦点事件监听器

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class focuseventtest extends jframe {

	/**
	 * 
	 */
	private static final long serialversionuid = 1l;

	public focuseventtest() {
		setsize(250, 100);
		setdefaultcloseoperation(windowconstants.exit_on_close);
		container cp = getcontentpane();
		getcontentpane().setlayout(new flowlayout());

		final jlabel label = new jlabel();
		getcontentpane().add(label);
		jtextfield jt = new jtextfield("请单击其他文本框", 10);
		jtextfield jt2 = new jtextfield("请单击我", 10);
		cp.add(jt);
		cp.add(jt2);
		jt.addfocuslistener(new focuslistener() {
			// 组件失去焦点时调用的方法
			public void focuslost(focusevent arg0) {
				joptionpane.showmessagedialog(null, "文本框失去焦点");
			}

			// 组件获取键盘焦点时调用的方法
			public void focusgained(focusevent arg0) {
			}
		});
		setvisible(true);
	}

	public static void main(string[] args) {
		new focuseventtest();
	}

}

Java Swing程序设计实战
Java Swing程序设计实战

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