java - How to make the component to respect column and row Weights? - 


public class tester {      public static class frame extends jframe {         public frame() {              // layout              gridbaglayout layout=new gridbaglayout();             layout.columnweights=new double[] { 0.5, 0.5 };             layout.rowweights=new double[] { 1 };              // frame                             setlayout(layout);             setsize(500,500);             setdefaultcloseoperation(jframe.dispose_on_close);              // constraints             gridbagconstraints c=new gridbagconstraints();             c.fill=gridbagconstraints.both;             // panel 1             jpanel p1=new jpanel();             p1.setbackground(color.green);             c.gridx=0;             c.gridy=0;             add(p1,c);              // panel 2             jlabel l1=new jlabel("testtesttesttesttesttesttesttesttesttesttesttest" +                                  "testtesttesttesttesttesttesttesttesttesttesttesttest");             l1.setbackground(color.yellow);             c.gridx=1;             c.gridy=0;             add(l1,c);         }     }      public static void main(string[] args) {         new frame().setvisible(true);        } }

in case l1 takes whole space, want take half, 1 says: layout.columnweights=new double[] { 0.5, 0.5 };

i put c.fill=gridbagconstraints.both; because want: if frame resized, want component resized, take maximum 50% space.

you add "filler" component "empty" side...

enter image description here

import java.awt.borderlayout; import java.awt.color; import java.awt.eventqueue; import java.awt.gridbagconstraints; import java.awt.gridbaglayout; import javax.swing.jframe; import javax.swing.jpanel; import javax.swing.uimanager; import javax.swing.unsupportedlookandfeelexception;  public class testlayout24 {      public static void main(string[] args) {         new testlayout24();     }      public testlayout24() {          eventqueue.invokelater(                         new runnable() {             @override             public void run() {                 try {                     uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname());                 } catch (classnotfoundexception | instantiationexception | illegalaccessexception | unsupportedlookandfeelexception ex) {                 }                  gridbagconstraints gbc = new gridbagconstraints();                 gbc.weightx = 0.5f;                 gbc.weighty = 0.1f;                 gbc.fill = gridbagconstraints.both;                  jpanel left = new jpanel();                 left.setbackground(color.red);                  jpanel right = new jpanel();                  jframe frame = new jframe("test");                 frame.setdefaultcloseoperation(jframe.exit_on_close);                 frame.setlayout(new gridbaglayout());                 frame.add(left, gbc);                 frame.add(right, gbc);                 frame.setsize(200, 200);                 frame.setlocationrelativeto(null);                 frame.setvisible(true);             }          });     }  }

or

you use gridlayout instead...

enter image description here

import java.awt.borderlayout; import java.awt.color; import java.awt.eventqueue; import java.awt.gridbagconstraints; import java.awt.gridbaglayout; import java.awt.gridlayout; import javax.swing.jframe; import javax.swing.jpanel; import javax.swing.uimanager; import javax.swing.unsupportedlookandfeelexception;  public class testlayout24 {      public static void main(string[] args) {         new testlayout24();     }      public testlayout24() {          eventqueue.invokelater(                         new runnable() {             @override             public void run() {                 try {                     uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname());                 } catch (classnotfoundexception | instantiationexception | illegalaccessexception | unsupportedlookandfeelexception ex) {                 }                  jpanel left = new jpanel();                 left.setbackground(color.red);                  jframe frame = new jframe("test");                 frame.setdefaultcloseoperation(jframe.exit_on_close);                 frame.setlayout(new gridlayout(0, 2));                 frame.add(left);                 frame.setsize(200, 200);                 frame.setlocationrelativeto(null);                 frame.setvisible(true);             }         });     } }

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