Common Controls 1

Final Display effect

① Label control, text box, Password box (button)

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② check box, Radio box (the radio button needs to be placed in a "Buttongroup")

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③ drop-down box, list box, scroll list box

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① uses text boxes to mark hints, use text boxes to accept input information, and use a password box to hide character information entered by the user.

/* *  small case, to achieve a landing interface.  *  using a grid layout, place three JPanel in JFrame, and use a grid layout to split the interface into 3 levels.  *  *  introduced three new components  *  tags, text boxes, password boxes.  */package part_2;import java.awt.*;import javax.swing.*;p ublic class e31_2  extends JFrame{    //  Defining class Variables     JPanel jp1,  JP2, JP3;    JLABEL JL1, JL2;    JBUTTON JB1,  jb2;    JTextField jtf1;    JPasswordField jpf1;         public static void main (String[] args)  {         e31_2 _e31_2 = new e31_2 ();     }        //  Constructors     public  E31_2 () {        //   Creating Components         jp1 = new jpanel ();         jp2 =  new jpanel ();         jp3 = new jpanel ();         jl1 = new jlabel ("User name");         jl2 = new jlabel ("password");         jb1 = new jbutton ("Confirm");        jb2 =  New jbutton ("Cancel");         jtf1 = new jtextfield (10 );         jpf1 = new jpasswordfield (Ten);                 //  Add Components          jp1.add (JL1);         jp1.add (JTF1) ;          jp2.add (JL2);         jp2.add (JPF1);         jp3.add (JB1);         jp3.add (JB2);         this.add (JP1);         this.add (JP2);         this.add (JP3);                 //  set up layout manager          this.setlayout (New gridlayout (3, 1));                 //  Set Form Properties          this.settitle ("Landing");         this.setsize (260,          this.setlocation (130, 130);         this. Setdefaultcloseoperation (Jframe.exit_on_close);                 //  Show Forms          This.setvisible (true);     }}

② check box to limit the input, the radio box to achieve a unique input, you need to put aunique set of information "Buttongroup", add components, respectively, to achieve the final effect.

/* *  */package part_2;import java.awt.*;import javax.swing.*;p Ublic class  e31_3 extends JFrame{    //  Defining class Variables     JPanel  Jp1, jp2, jp3;    jlabel jl1, jl2;    jbutton  jb1, jb2;    JCheckBox jcb1, jcb2, jcb3;     jradiobutton jrb_11, jrb_12;    buttongroup jbg1;         public static void main (String[] args)  {         e31_3 _e31_3 = new e31_3 ();    }         //  Constructor     public e31_3 () {         //  Creating Components         jp1 =  new jpanel (); &nbSp;       jp2 = new jpanel ();         jp3 = new jpanel ();         jl1 =  new jlabel ("Favorite Sport");        jl2 = new  JLabel ("gender");         jb1 = new jbutton ("Registered user");         jb2 = new jbutton ("de-registration");         jcb1 = new jcheckbox ("Football");         jcb2 = new jcheckbox ("basketball");         jcb3 =  new jcheckbox ("Tennis");        jrb_11 = new  Jradiobutton ("male");         jrb_12 = new jradiobutton ("female") );     &NBsp;   jbg1 = new buttongroup ();                         //  Adding components         jbg1.add (Jrb_11);         jbg1.add (Jrb_12);         jp1.add (JL1);         jp1.add (JCB1);         jp1.add (JCB2);         jp1.add (JCB3);         Jp2.add (JL2);         jp2.add (Jrb_11);         jp2.add (Jrb_12);         jp3.add (JB1);         jp3.add (JB2);         this.add (JP1) ;      &nBsp;  this.add (JP2);         this.add (JP3);                 //  set up layout manager          this.setlayout (New gridlayout (3, 1));                 //  Set Form Properties          this.settitle ("User registration");         This.setdefaultcloseoperation (Jframe.exit_on_close);         This.setsize (400, 157);                 //  Display Form         this.setvisible (true);     }}

③ list Box

/* *  drop-down box  JComboBox *  list box  JList *  Scroll window  jscrollpane */package  part_2;import java.awt.*;import javax.swing.*;p ublic class e31_4 extends  jframe{    //  Defining class Variables     JComboBox jcb1;    &NBSP;JLIST&NBSP;JL1;&NBSP;&NBSP;&NBSP;&NBSP;JSCROLLPANE&NBSP;JSP1;&NBSP;&NBSP;&NBSP;&NBSP;JPANEL&NBSP;JP1,  jp2;    JLabel jl1, jl2;         Public static void main (String[] args)  {         e31_4 _e31_4 = new e31_4 ();    }         //  Constructor     public e31_4 () {         //  Create Component         jl1 = new jlabel ("drop-down box") ;         string[] tmp4jcb1 = {"Tang Sanzang", "Monkey King", "Pig Awareness can", "Sand Wu Jing"};         jcb1 = new JComboBox<> (TMP4JCB1);                 jl2 = new jlabel ("list box");         string[] tmp4jl1 = {"孙红蕾", "Chow Yun-Fat", "Stephen Chow Chi", "Andy Lau"};         jL1 = new JList<> (TMP4JL1);         jl1.setvisiblerowcount (1);                 jsp1 = new jscrollpane (jL1);                          jp1 = new jpanel ();         jp2 =  new jpanel ();                          //  Add Component         jp1.add (JL1);         jp2.add (JL2);         Jp1.add (JCB1);//        jp2.add (jL1);         jp2.add (JSP1);         this.add (JP1);         this.add (JP2);                         //  set up layout manager          this.setlayout (New gridlayout (3, 1));                 //  Set Form Properties          thIs.settitle ("list box ...");         this.setdefaultcloseoperation ( Jframe.exit_on_close);         this.setsize (400, 360);                 //  Show Forms          this.setvisible (true);     }}

　　Using 57 lines, block 56 rows.

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This article from "Little Cui's experimental notes" blog, declined to reprint!

Common Controls 1