30 lines
468 B
Java
30 lines
468 B
Java
package ch04;
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import java.applet.*;
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import java.awt.*;
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class Chengji {
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float fun(float x, float y) {
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return x * y;
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}
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}
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class AddChengji extends Chengji {
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float fun(float x, float y) {
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return x + y;
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}
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}
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public class TestAddChengji extends Applet {
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AddChengji sum;
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public void init() {
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sum = new AddChengji();
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}
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public void paint(Graphics g) {
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g.drawString("sum=" + sum.fun(4, 6), 100, 40);
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}
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}
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