the source's code attached below. 2 jtextfield construct in same way. don't know why second one's settext(string) method doesn't work.
package ztio.gui.updategui; import java.awt.container; import java.awt.gridbagconstraints; import java.awt.gridbaglayout; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.io.ioexception; import java.util.arraylist; import java.util.arrays; import java.util.list; import java.util.map; import java.util.set; import javax.swing.borderfactory; import javax.swing.box; import javax.swing.boxlayout; import javax.swing.jbutton; import javax.swing.jcombobox; import javax.swing.jdialog; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.jtextfield; import javax.swing.uimanager; import javax.swing.unsupportedlookandfeelexception; import javax.swing.border.titledborder; public class simplesettingdialog extends jdialog { private final int max_thres_num = 10; private final int max_value_thres_num = 10; private jpanel dialogpane; private jcombobox testcasecombo; private jcombobox testcaseitemcombo; private jcombobox[] judgeoperationcomboarray = new jcombobox[max_thres_num]; private jcombobox[] threstypecomboarray = new jcombobox[max_thres_num]; private string[] judgeoperationstrings; private string[] threstypestrings; private list<jbutton> testbtnlist; private jtextfield showtargetchoice; private jtextfield showtestcase; public simplesettingdialog(jframe parent, boolean ismodal) { // todo auto-generated constructor stub super(parent, ismodal); string[] judges = {">", "<", "="}; string[] types = {"int", "float", "string"}; judgeoperationstrings = judges; threstypestrings = types; dialogpane = (jpanel) getcontentpane(); dialogpane.setlayout(new gridbaglayout()); titledborder titled = borderfactory.createtitledborder("config thresholds"); dialogpane.setborder(titled); jpanel testcasepanel = createtestcasepanel(); gridbagconstraints c = new gridbagconstraints(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.weighty = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 0; dialogpane.add(testcasepanel, c); c.fill = gridbagconstraints.both; c.ipady = 0; c.weightx = 1.0; c.weighty = 1.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 1; jpanel testitempanel = createtestcaseitempanel(); jpanel debug = new jpanel(); dialogpane.add(debug, c); } private jpanel createthreslistpanel() { jpanel threslistpanel = new jpanel(); threslistpanel.setlayout(new boxlayout(threslistpanel, boxlayout.y_axis)); for(int = 0; < 2; ++i){ jpanel threspanel = createthrespanel(i); threslistpanel.add(threspanel); } return threslistpanel; } private jpanel createthrespanel(int i) { // todo auto-generated method stub jpanel threspanel = new jpanel(new gridbaglayout()); titledborder titled = borderfactory.createtitledborder("the " + (((i+1)==1)?"1st":((i+1)==2?"2nd":((i+1==3?"3rd":((i+1)+"th"))))) + " threshold" ); threspanel.setborder(titled); jcombobox threstypecombo = new jcombobox(threstypestrings); threstypecomboarray[i] = threstypecombo; threstypecombo.setselecteditem("string"); jcombobox judgeoperationcombo = new jcombobox(judgeoperationstrings); judgeoperationcomboarray[i] = judgeoperationcombo; judgeoperationcombo.setselecteditem("="); jlabel label1 = new jlabel("threshold's type:"); jlabel label2 = new jlabel("judge operation:"); gridbagconstraints c = new gridbagconstraints(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 0; threspanel.add(label1, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.gridwidth = 1; c.gridx = 1; c.gridy = 0; threspanel.add(threstypecombo, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 1; threspanel.add(label2, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.gridwidth = 1; c.gridx = 1; c.gridy = 1; threspanel.add(judgeoperationcombo, c); return threspanel; } private jpanel createtestcaseitempanel() { // todo auto-generated method stub string[] testitemnamearray = {"volume", "brightness"}; testcaseitemcombo = new jcombobox(testitemnamearray); testcaseitemcombo.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub jcombobox cb = (jcombobox)e.getsource(); string caseitemname = (string)cb.getselecteditem(); string casename = (string)testcasecombo.getselecteditem(); string targetstring = casename + "->" + caseitemname; system.out.println(targetstring); system.out.println("target text field: " + showtargetchoice.gettext()); showtargetchoice.settext(targetstring); } }); titledborder titled; titled = borderfactory.createtitledborder("test case item"); jpanel comp = new jpanel(new gridbaglayout()); comp.setborder(titled); jbutton btnaddtestcaseitem = new jbutton("add"); btnaddtestcaseitem.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub } }); jbutton btndeltestcaseitem = new jbutton("del"); btndeltestcaseitem.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub } }); gridbagconstraints c = new gridbagconstraints(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 0; comp.add(testcaseitemcombo, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 1; c.gridy = 0; comp.add(btnaddtestcaseitem, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 2; c.gridy = 0; comp.add(btndeltestcaseitem, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.gridwidth = 1; c.gridx = 3; c.gridy = 0; comp.add(new jpanel(), c); //row 2 jlabel labelregexp = new jlabel("target string:"); showtargetchoice = new jtextfield(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 1; comp.add(labelregexp, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 3; c.gridx = 1; c.gridy = 1; comp.add(showtargetchoice, c); jpanel threslistpanel = createthreslistpanel(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 4; c.gridx = 0; c.gridy = 2; comp.add(threslistpanel, c); return comp; } private jpanel createtestcasepanel() { // todo auto-generated method stub string[] testcasearray = {"light", "voice"}; testcasecombo = new jcombobox(testcasearray); testcasecombo.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub jcombobox cb = (jcombobox)e.getsource(); string casename = (string)cb.getselecteditem(); system.out.println(casename); showtestcase.settext(casename); } }); titledborder titled; titled = borderfactory.createtitledborder("test case"); jpanel comp = new jpanel(new gridbaglayout()); comp.setborder(titled); jbutton btnaddtestcase = new jbutton("add"); btnaddtestcase.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub } }); jbutton btndeltestcase = new jbutton("del"); btndeltestcase.addactionlistener(new actionlistener() { public void actionperformed(actionevent e) { // todo auto-generated method stub } }); gridbagconstraints c = new gridbagconstraints(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 0; comp.add(testcasecombo, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 1; c.gridy = 0; comp.add(btnaddtestcase, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 2; c.gridy = 0; comp.add(btndeltestcase, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.gridwidth = 1; c.gridx = 3; c.gridy = 0; comp.add(new jpanel(), c); jlabel label = new jlabel("selected test case:"); showtestcase = new jtextfield(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 1; c.gridx = 0; c.gridy = 1; comp.add(label, c); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 1.0; c.gridwidth = 3; c.gridx = 1; c.gridy = 1; comp.add(showtestcase, c); jpanel testcaseitempanel = createtestcaseitempanel(); c.fill = gridbagconstraints.horizontal; c.ipady = 0; c.weightx = 0.0; c.gridwidth = 4; c.gridx = 0; c.gridy = 2; comp.add(testcaseitempanel, c); return comp; } private static void createandshowgui() { jframe frame = new jframe("simplesettingdemo"); frame.setdefaultcloseoperation(jframe.exit_on_close); jbutton btn = new jbutton("open setting dialog"); btn.addactionlistener(new actionlistener() { @override public void actionperformed(actionevent e) { // todo auto-generated method stub simplesettingdialog simplesettingdialog = new simplesettingdialog(frame, true); simplesettingdialog.pack(); simplesettingdialog.setvisible(true); } }); frame.getcontentpane().add(btn); frame.pack(); frame.setvisible(true); } public static void main(string[] args) { try { uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname()); } catch (classnotfoundexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (instantiationexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (illegalaccessexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (unsupportedlookandfeelexception e) { // todo auto-generated catch block e.printstacktrace(); } javax.swing.swingutilities.invokelater(new runnable() { public void run() { createandshowgui(); } }); } }
createtestcaseitempanel() executed twice. once executed createtestcasepanel(). second time @ line in constructor:
jpanel testitempanel = createtestcaseitempanel(); this second call creates local variable testitempanel not used. overrides of members, 1 of them showtargetchoice, points field not visible.
to fix issue rid of second call.
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