ClassDemo04.java
public class ClassDemo04 { private int a; // 這裡定義建構子 public ClassDemo04(int p1) { setA(p1); } public void setA(int p1) { a = p1; } public int getA() { return a; } public int doSomething(int p1) { return a + p1; } public static void main(String[] args) { ClassDemo04 d = new ClassDemo04(10); System.out.println(); System.out.println(d.getA()); System.out.println(d.doSomething(1)); System.out.println(); } } /* 檔名: ClassDemo04.java 作者: Kaiching Chang 時間: September, 2014 */
ClassDemo05.java
public class ClassDemo05 { private int a; public ClassDemo05(int a) { setA(a); } public void setA(int a) { // 利用 this 存取屬性 this.a = a; } public int getA() { return a; } public int doSomething(int a) { // 參數跟屬性使用相同的識別字 return this.a + a; } public static void main(String[] args) { ClassDemo05 d = new ClassDemo05(13); System.out.println(); System.out.println(d.getA()); System.out.println(d.doSomething(9)); System.out.println(); } } /* 檔名: ClassDemo05.java 作者: Kaiching Chang 時間: September, 2014 */
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