这篇文章主要介绍了java弹簧布局管理器使用方法详解,需要的朋友可以参考下
        由 springlayout 类实现的布局管理器称为弹簧布局管理器。利用该布局管理器管理组件，当改变窗体的大小时，能够在不改变组件间相对位置的前提下自动调整组件大小，使组件依旧布满整个窗体，从而保证了窗体的整体效果。下面，通过一个实例来看看弹簧布局管理器的使用方法和效果。
        弹簧布局管理器以容器和组件的边缘为操作对象，通过为组件和容器边缘以及组件和组件边缘建立约束，实现对组件布局的管理。通过方法 putconstraint(string e1,conponet c1,int pad,string e2,componet c2)可以为各边之间建立约束，该方法的入口参数说明如下：
c1：需要参考的组件对象；
c2：需要参考的组件对象的具体需要参考的边；
e1：被参考的组件对象；
e2：被参考的组件对象的具体被参考的边；
 pad：两条边之间的距离，即两个组件之间的间距。
        有点绕，其实很好理解。
        实例1：使用弹簧布局管理器。
        本实例利用弹簧布局管理器实现窗体，在调整窗体的大小后，组件仍会布满整个窗体，并且组件间的相对位置并不会改变。源码：
import java.awt.container; import java.awt.event.windowadapter; import java.awt.event.windowevent; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jscrollpane; import javax.swing.jtextarea; import javax.swing.jtextfield; import javax.swing.spring; import javax.swing.springlayout; public class springlayout_3 extends jframe { private static final long serialversionuid = -6045918631932051025l; public springlayout_3() { // todo auto-generated constructor stub container container = getcontentpane(); springlayout springlayout = new springlayout(); container.setlayout(springlayout); jlabel topiclabel = new jlabel("主题 :"); jlabel contentlabel = new jlabel("内容 :"); final jtextfield textfield = new jtextfield(30); jtextarea textarea = new jtextarea(3, 30); jscrollpane scrollpane = new jscrollpane(); scrollpane.setviewportview(textarea); textarea.setlinewrap(true); final jbutton confirmbutton = new jbutton("取消"); jbutton cancelbutton = new jbutton("确认"); spring st = spring.constant(10); spring st2 = spring.constant(30); container.add(topiclabel); springlayout.putconstraint(springlayout.north, topiclabel, st, springlayout.north, container); springlayout.putconstraint(springlayout.west, topiclabel, st, springlayout.west, container); container.add(textfield); springlayout.putconstraint(springlayout.west, textfield, st2, springlayout.east, topiclabel); springlayout.putconstraint(springlayout.north, textfield, 0, springlayout.north, topiclabel); springlayout.putconstraint(springlayout.east, textfield, spring.minus(st), springlayout.east, container); container.add(contentlabel); springlayout.putconstraint(springlayout.west, contentlabel, 0, springlayout.west, topiclabel); springlayout.putconstraint(springlayout.north, contentlabel, st, springlayout.south, topiclabel); container.add(scrollpane); springlayout.putconstraint(springlayout.north, scrollpane, 0, springlayout.north, contentlabel); springlayout.putconstraint(springlayout.west, scrollpane, 0, springlayout.west, textfield); springlayout.putconstraint(springlayout.east, scrollpane, spring.minus(st), springlayout.east, container); container.add(confirmbutton); springlayout.putconstraint(springlayout.south, scrollpane, spring.minus(st), springlayout.north, confirmbutton); springlayout.putconstraint(springlayout.east, confirmbutton, spring.minus(st), springlayout.east, container); springlayout.putconstraint(springlayout.south, confirmbutton, spring.minus(st), springlayout.south, container); container.add(cancelbutton); springlayout.putconstraint(springlayout.east, cancelbutton, spring.minus(st), springlayout.west, confirmbutton); springlayout.putconstraint(springlayout.north, cancelbutton, 0, springlayout.north, confirmbutton); // make the text field focused every time the window is activated addwindowfocuslistener(new windowadapter() { @override public void windowgainedfocus(windowevent e) { // todo auto-generated method stub textfield.requestfocus(); } }); } public static void main(string[] args) { // todo auto-generated method stub springlayout_3 frame = new springlayout_3(); frame.settitle("使用弹簧布局管理器"); frame.setvisible(true); frame.setdefaultcloseoperation(jframe.exit_on_close); frame.setbounds(100, 100, 600, 300); } }
以上就是java弹簧布局管理器使用教程的详细内容。