52 lines
1.4 KiB
Java
52 lines
1.4 KiB
Java
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Passing arrays and individual array elements to methods
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import java.awt.Container;
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import javax.swing.*;
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public class PassArray extends JApplet
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{
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JTextArea outputArea;
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String output;
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public void init()
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{
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outputArea = new JTextArea();
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Container c = getContentPane();
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c.add( outputArea );
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int a[] = { 1, 2, 3, 4, 5 };
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output = "Effects of passing entire " + "array call-by-reference:\n" +
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"The values of the original array are:\n";
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for ( int i = 0; i < a.length; i++ )
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output += " " + a[ i ];
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modifyArray( a ); // array a passed call-by-reference
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output += "\n\nThe values of the modified array are:\n";
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for ( int i = 0; i < a.length; i++ )
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output += " " + a[ i ];
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output += "\n\nEffects of passing array " + "element call-by-value:\n" +
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"a[3] before modifyElement: " + a[ 3 ];
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modifyElement( a[ 3 ] );
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output += "\na[3] after modifyElement: " + a[ 3 ];
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outputArea.setText( output );
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}
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public void modifyArray( int b[] )
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{
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for ( int j = 0; j < b.length; j++ )
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b[ j ] *= 2;
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}
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public void modifyElement( int e )
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{
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e *= 2;
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}
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}
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