在Java中编写一个方法来返回对象内部的字符串

private String internalString;

public MyClass(String str) {
    internalString = str;
}

public String getInternalString() {
    return internalString;
}

public class MyClass {
    private String internalString;

    public MyClass(String str) {
        internalString = str;
    }

    public String getInternalString() {
        return internalString;
    }
}

MyClass obj = new MyClass("Hello, World!");
String str = obj.getInternalString();
System.out.println(str);  // 输出：Hello, World!