?? changed.java~16~
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package changed;import javax.swing.UIManager;import java.awt.*;public class Changed { void changeInt(int x){ x++; //return x; System.out.print("a="+x); } void changeDouble(double y){ y*=1.2; System.out.print(" b="+y); } void changeChar(char c){ c='w'; System.out.print(" c="+c); } void changeBoolean(boolean b){ b=!b; System.out.print(" d="+b); } public static void main(String[] args) { int a=2; double b=5.3f; char c='e'; boolean d=true; System.out.println("before change:"); System.out.println("a="+a+" b="+b+" c="+c+" d="+d); Changed cha=new Changed(); // 創建一個 change 類型的對象 cha System.out.println("after change:"); cha.changeInt(a); System.out.print("a="+a); cha.changeDouble(b); cha.changeChar(c); cha.changeBoolean(d); }}?? 快捷鍵說明
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