test24.java~

来自「SCJP认证考试资料」· JAVA~ 代码 · 共 19 行

public final class Test34 {
    private String str;
    public EqualsDemo(String s) {
	str = s;
    }
    public boolean equals(EqualsDemo obj) {
	if (!(obj instanceof EqualsDemo)) {
	    return false;
	}
	EqualsDemo ed = (EqualsDemo)obj;
	return (str == ed.str||(str != null&&str.equals(ed.str)));
    }
    public static void main(String[] args) {
	EqualsDemo demo1 = new EqualsDemo("java");
	EqualsDemo deno2 = new EqualsDemo("JAVA");
	System.out.println(demo1.equals(demo2));
    }
}