Java 中 long 累加器 toString()方法，带示例
原文:https://www . geesforgeks . org/long 累加器-tostring-method-in-Java-with-examples/
java。long 累加器. toString() 是 java 中的一个内置方法，它返回 long 累加器实例当前值的字符串表示形式。
语法:
public String toString()
参数:该方法不接受任何参数。
返回值:该方法返回当前值的字符串表示形式。
下面的程序说明了上述方法:
程序 1 :
// Program to demonstrate the toString() method
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
public class GFG {
public static void main(String args[])
{
LongAccumulator num = new LongAccumulator(Long::sum, 0L);
// accumulate operation on num
num.accumulate(42);
num.accumulate(10);
num.get();
// before toString the value is
System.out.println(" the old value is: " + num);
;
// toStrings current value
num.toString();
// Print after toString operation
System.out.println(" the current value is: " + num);
}
}
输出:
the old value is: 52
the current value is: 52
程序二 :
// program to demonstrate the toString() method
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
public class GFG {
public static void main(String args[])
{
LongAccumulator num = new LongAccumulator(Long::sum, 0L);
// accumulate operation on num
num.accumulate(5);
num.accumulate(10);
num.get();
// before toString the value is
System.out.println(" the old value is: " + num);
// toStrings current value
num.toString();
// Print after toString operation
System.out.println(" the current value is: " + num);
}
}
输出:
the old value is: 15
the current value is: 15
参考:https://docs . Oracle . com/javase/8/docs/API/Java/util/concurrent/atomic/long 累加器. html # toString–
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