範例

public class ClassA {
private final StringBuffer stringObject = new StringBuffer("A new String");
private StringBuffer nonConstantString = new StringBuffer("Changing String");

public void method() {
StringBuffer localString;
final StringBuffer localConstantString;
}
}

解決方案

改用 String 來宣告 constant(final) StringBuffer 物件。

public class ClassA {
private final String stringObject = "A new String";
private StringBuffer nonConstantString = new StringBuffer("Changing String");

public void method() {
StringBuffer localString;
final String localConstantString;
}
}