test24.java

来自「SCJP认证考试资料」· Java 代码 · 共 19 行

public final class Test24{
    private String str;
    public Test24(String s) {
	str = s;
    }
    public boolean equals(Test24 obj) {
	if (!(obj instanceof Test24)) {
	    return false;
	}
	Test24 ed = (Test24)obj;
	return (str == ed.str||(str != null&&str.equals(ed.str)));
    }
    public static void main(String[] args) {
	Test24 demo1 = new Test24("java");
	Test24 demo2 = new Test24("JAVA");
	System.out.println(demo1.equals(demo2));
    }
}