我有一些代码看起来没问题,但是 Intellij IDEA 警告它的许多方法返回
值
Return value of the method is never used
下面是实际代码,一个构建器类。
public static class StreamParserBuilder{
//optional - have defaults:
private long spanLimit1 = 2000L;
private long spanLimit2 = 100000L;
private long spanLimit3 = 3000000L;
private String[] coordinates = {"L1", "R2"};
private String outputDirectory = System.getProperty("user.dir");
private boolean isLastSteam = false;
//required from the builder.
private String[] args;
private String inputFile;
private String streamData;
private boolean isPaired;
public StreamParserBuilder(String[] args, String inputFile, String streamData, boolean isPaired){
this.args = args;
this.inputFile = inputFile;
this.streamData = streamData;
this.isPaired = isPaired;
}
public StreamParserBuilder withSpanLimit1(long spanLimit1){
this.spanLimit1 = spanLimit1;
return this;
}
public StreamParserBuilder withSpanLimit2(long spanLimit2){
this.spanLimit2 = spanLimit2;
return this;
}
public StreamParserBuilder withSpanLimit3(long spanLimit3){
this.spanLimit3 = spanLimit3;
return this;
}
public StreamParserBuilder withCoordinates(String[] coordinates){
this.coordinates = coordinates;
return this;
}
public StreamParserBuilder withOutputDirectory(String outputDirectory){
this.outputDirectory = outputDirectory;
return this;
}
public StreamParserBuilder isLastStream(boolean isLastSteam){
this.isLastSteam = isLastSteam;
return this;
}
public StreamParser build(){
return new StreamParser(this);
}
代码是否有问题,也许我错误地实例化了 .build() 方法?我的 StreamParser 构造函数的代码:
private StreamParser(StreamParserBuilder streamParserBuilder){
this.args = streamParserBuilder.args;
this.inputFile = streamParserBuilder.inputFile;
this.streamData = streamParserBuilder.streamData;
this.spanLimit1 = streamParserBuilder.spanLimit1;
this.spanLimit2 = streamParserBuilder.spanLimit2;
this.spanLimit3 = streamParserBuilder.spanLimit3;
this.coordinates = streamParserBuilder.coordinates;
this.outputDirectory = streamParserBuilder.outputDirectory;
this.isLastStream = streamParserBuilder.isLastSteam;
this.isPaired = streamParserBuilder.isPaired;
}
有没有更好的方法来实现这个?如果代码没问题,是什么导致了这个警告?
编辑:使用 StreamParserBuilder,调用 withX 函数:
StreamParserBuilder streamBuilder = new StreamParserBuilder(args, inputFile, stream, isPaired);
if (isSpanOneReplaced) streamBuilder.withSpanLimit1(spanLimit1);
if (isSpanTwoReplaced) streamBuilder.withSpanLimit2(spanLimit2);
if (isSpanThreeReplaced) streamBuilder.withSpanLimit3(spanLimit3);
if (areCoordinatesReplaced) streamBuilder.withCoordinates(coordinates);
if (isOutputDirectoryReplaced) streamBuilder.withOutputDirectory(outputDirectory);
if (streamCount == streamData.size()) streamBuilder.isLastStream(true);
StreamParser streamParser = streamBuilder.build();
最佳答案
“从未使用该方法的返回值”是来自Java | 的警告。声明冗余 |方法可以用void
检查。生成此警告是因为调用站点从未使用此方法返回的值。可以通过使用 @SuppressWarnings("UnusedReturnValue")
注释类或在 Settings | 中禁用检查来忽略警告编辑|检查
。
关于java - Intellij 警告 : Return value of the method is never used,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48168078/