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65 lines
1.8 KiB
Java
65 lines
1.8 KiB
Java
Linear Search of an Array
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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public class LinearSearch extends JApplet implements ActionListener
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{
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JLabel enterLabel, resultLabel;
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JTextField enter, result;
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int a[];
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public void init()
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{
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Container c = getContentPane();
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c.setLayout( new FlowLayout() );
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enterLabel = new JLabel( "Enter integer search key" );
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c.add( enterLabel );
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enter = new JTextField( 10 );
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enter.addActionListener( this );
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c.add( enter );
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resultLabel = new JLabel( "Result" );
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c.add( resultLabel );
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result = new JTextField( 20 );
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result.setEditable( false );
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c.add( result );
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// create array and populate with even integers 0 to 198
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a = new int[ 100 ];
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for ( int i = 0; i < a.length; i++ )
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a[ i ] = 2 * i;
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}
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// Search "array" for the specified "key" value
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public int linearSearch( int array[], int key )
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{
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for ( int n = 0; n < a.length; n++ )
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if ( array[ n ] == key )
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return n;
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return -1;
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}
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public void actionPerformed( ActionEvent e )
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{
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String searchKey = e.getActionCommand();
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// Array a is passed to linearSearch even though it
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// is an instance variable. Normally an array will
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// be passed to a method for searching.
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int element = linearSearch( a, Integer.parseInt( searchKey ) );
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if ( element != -1 )
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result.setText( "Found value in element " + element );
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else
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result.setText( "Value not found" );
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}
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}
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