Java FlowLayout

by Online Tutorials Library July 14, 2022

Java FlowLayout

The Java FlowLayout class is used to arrange the components in a line, one after another (in a flow). It is the default layout of the applet or panel.

Fields of FlowLayout class

public static final int LEFT
public static final int RIGHT
public static final int CENTER
public static final int LEADING
public static final int TRAILING

Constructors of FlowLayout class

FlowLayout(): creates a flow layout with centered alignment and a default 5 unit horizontal and vertical gap.
FlowLayout(int align): creates a flow layout with the given alignment and a default 5 unit horizontal and vertical gap.
FlowLayout(int align, int hgap, int vgap): creates a flow layout with the given alignment and the given horizontal and vertical gap.

Example of FlowLayout class: Using FlowLayout() constructor

FileName: FlowLayoutExample.java

  // import statements  import java.awt.*;    import javax.swing.*;        public class FlowLayoutExample  {      JFrame frameObj;    // constructor    FlowLayoutExample()  {        // creating a frame object      frameObj = new JFrame();                 // creating the buttons      JButton b1 = new JButton(“1”);        JButton b2 = new JButton(“2”);        JButton b3 = new JButton(“3”);        JButton b4 = new JButton(“4”);        JButton b5 = new JButton(“5”);      JButton b6 = new JButton(“6”);        JButton b7 = new JButton(“7”);        JButton b8 = new JButton(“8”);        JButton b9 = new JButton(“9”);        JButton b10 = new JButton(“10”);                     // adding the buttons to frame            frameObj.add(b1); frameObj.add(b2); frameObj.add(b3); frameObj.add(b4);          frameObj.add(b5); frameObj.add(b6);  frameObj.add(b7);  frameObj.add(b8);        frameObj.add(b9);  frameObj.add(b10);                 // parameter less constructor is used      // therefore, alignment is center       // horizontal as well as the vertical gap is 5 units.      frameObj.setLayout(new FlowLayout());                frameObj.setSize(300, 300);        frameObj.setVisible(true);    }      // main method  public static void main(String argvs[])   {        new FlowLayoutExample();    }    }    

Output:

Java FlowLayout

Example of FlowLayout class: Using FlowLayout(int align) constructor

FileName: MyFlowLayout.java

  import java.awt.*;    import javax.swing.*;        public class MyFlowLayout{    JFrame f;    MyFlowLayout(){        f=new JFrame();                JButton b1=new JButton(“1”);        JButton b2=new JButton(“2”);        JButton b3=new JButton(“3”);        JButton b4=new JButton(“4”);        JButton b5=new JButton(“5”);           // adding buttons to the frame               f.add(b1); f.add(b2); f.add(b3); f.add(b4); f.add(b5);           // setting flow layout of right alignment        f.setLayout(new FlowLayout(FlowLayout.RIGHT));              f.setSize(300,300);        f.setVisible(true);    }    public static void main(String[] args) {        new MyFlowLayout();    }    }    

Output:

Java FlowLayout

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Example of FlowLayout class: Using FlowLayout(int align, int hgap, int vgap) constructor

FileName: FlowLayoutExample1.java

  // import statement  import java.awt.*;    import javax.swing.*;        public class FlowLayoutExample1  {    JFrame frameObj;    // constructor    FlowLayoutExample1()  {        // creating a frame object      frameObj = new JFrame();                 // creating the buttons      JButton b1 = new JButton(“1”);        JButton b2 = new JButton(“2”);        JButton b3 = new JButton(“3”);        JButton b4 = new JButton(“4”);        JButton b5 = new JButton(“5”);      JButton b6 = new JButton(“6”);        JButton b7 = new JButton(“7”);        JButton b8 = new JButton(“8”);        JButton b9 = new JButton(“9”);        JButton b10 = new JButton(“10”);                     // adding the buttons to frame            frameObj.add(b1); frameObj.add(b2); frameObj.add(b3); frameObj.add(b4);          frameObj.add(b5); frameObj.add(b6);  frameObj.add(b7);  frameObj.add(b8);        frameObj.add(b9);  frameObj.add(b10);                 // parameterized constructor is used      // where alignment is left       // horizontal gap is 20 units and vertical gap is 25 units.      frameObj.setLayout(new FlowLayout(FlowLayout.LEFT, 20, 25));                  frameObj.setSize(300, 300);        frameObj.setVisible(true);    }    // main method  public static void main(String argvs[])   {        new FlowLayoutExample1();    }    }    

Output:

Java FlowLayout

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Example of FlowLayout class: Using FlowLayout(int align) constructor

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